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123-412: When provided as a morale boost or care package, military chocolate is often no different from normal store-bought bars in taste and composition. However, they are frequently packaged or molded differently. The World War II K ration issued in temperate climates sometimes included a bar of Hershey's commercial-formula sweet chocolate. But instead of being the typical flat thin bar, the K ration chocolate

246-659: A Neutrality Pact in April 1941, and Japan adopted the doctrine of Nanshin-ron , promoted by the Navy, which took its focus southward and eventually led to war with the United States and the Western Allies. In Europe, Germany and Italy were becoming more aggressive. In March 1938, Germany annexed Austria , again provoking little response from other European powers. Encouraged, Hitler began pressing German claims on

369-578: A cautious French probe into the Saarland . The Western Allies also began a naval blockade of Germany , which aimed to damage the country's economy and war effort. Germany responded by ordering U-boat warfare against Allied merchant and warships, which would later escalate into the Battle of the Atlantic . On 8 September, German troops reached the suburbs of Warsaw . The Polish counter-offensive to

492-548: A 4-pack of commercial-grade cigarettes, and either a flat rectangular stick of chewing gum or a square piece of candy-coated gum . Special items (like matches or Halazone tablets ) were packed in one unit but not the others due to space limitations. Late production meals added a paper-wrapped paddle-like disposable wooden spoon and used the standard P-38 can opener instead of the "twist key". In total three meals provided 2,830 kilocalories (11,800 kilojoules) of food energy and 79 grams of protein, depending upon components. As it

615-433: A capital letter on each end (B, D, or S). The later "Morale Series" had unique packaging designs that were color-coded and letter-coded on the ends for quick identification. The breakfast ration box had brown printing and was marked with a brown capital letter "B" on the ends, the dinner ration box had blue printing and was marked with a blue capital letter "D" on the ends, and the supper ration box had olive drab printing and

738-467: A cardboard carton, which was also coated. These cartons were packed 12 to a wooden crate, for a total of 144 bars to a crate. After U.S. entry into the Second World War, Congress planned to shut down the candy industry for the duration of the conflict, deeming it non-essential. Milton Hershey , fighting off attempts to ration sugar, corn syrup, and cocoa, claimed to Congress that chocolate was

861-507: A complete K-ration was 2,830 kcal (11,800 kJ) for the ration (breakfast, dinner and supper), fewer than required by highly active men, especially those working in extreme heat or bitter cold, and malnutrition became evident. The packaging of the K-ration into separately described daily meals may have intensified this problem by leading commanders to assume that daily caloric intake was sufficient. An extensive 1943 field report from

984-540: A decline in resistance to various tropical diseases. A British medical officer reported that, of 209 Chindits examined at the end of this time, 182 had lost up to 30 pounds (14 kg) and 27 had lost from 30 to 70 pounds (14 to 32 kg). Deficiency diseases such as pellagra and beriberi were diagnosed. One of British General Orde Wingate 's units in the Dehra Dun area was visited by quartermaster logistics officers some months after they had last eaten K-rations. At

1107-417: A fudge-like texture. During Operation Desert Shield and Operation Desert Storm , Hershey's Chocolate was the major manufacturer, shipping 144,000 bars to American troops in the southwest Asia theater. While Army spokesmen said the bar's taste was good, troop reactions were mixed and the bar was not put into full production. Since the war ended before Hershey's supplies of the experimental bar were shipped,

1230-437: A nearby U.S. Army base. The meals only gained "palatable" and "better than nothing" ratings from the soldiers, but were successful in relieving hunger and providing sufficient energy. The new rations were initially intended as individual rations suitable for short durations only, to be used for a maximum of fifteen meals before supplementation or replacement with ' A-ration ' or ' B-ration ' field rations. They were soon called

1353-413: A non-perishable, ready-to-eat meal that could fit in a soldier's pocket as a short-duration, individual ration. Keys went to a local supermarket to choose foods that would be inexpensive, but still be enough to provide energy. He purchased hard biscuits , dry sausages , hard candy , and chocolate bars . He then tested his 28-ounce (800-gram), 3,200-kilocalorie (13,000-kilojoule) meals on six soldiers in

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1476-524: A pretext to initiate the invasion. The first German attack of the war came against the Polish defences at Westerplatte . The United Kingdom responded with an ultimatum for Germany to cease military operations, and on 3 September, after the ultimatum was ignored, Britain and France declared war on Germany. During the Phoney War period, the alliance provided no direct military support to Poland, outside of

1599-781: A pretext to worsen relations. On 29 August, Hitler demanded that a Polish plenipotentiary immediately travel to Berlin to negotiate the handover of Danzig , and to allow a plebiscite in the Polish Corridor in which the German minority would vote on secession. The Poles refused to comply with the German demands, and on the night of 30–31 August in a confrontational meeting with the British ambassador Nevile Henderson , Ribbentrop declared that Germany considered its claims rejected. On 1 September 1939, Germany invaded Poland after having staged several false flag border incidents as

1722-564: A resemblance to normal chocolate bars in its shape and flavor than the original D ration, which it gradually replaced by 1945. While attempts to sweeten its flavor were somewhat successful, nearly all U.S. soldiers found the Tropical Bar tough to chew and unappetizing; reports from countless memoirs and field reports are almost uniformly negative. Instead, the bar was either discarded or traded to unsuspecting Allied troops or civilians for more appetizing foods or goods. Resistance to accepting

1845-425: A scale of one K-ration per man per day, using the prior experiments with airborne forces as evidence. The ration's intended use as a short-term assault ration would soon fall by the wayside once U.S. forces entered combat. One major criticism of the K-ration was its caloric and vitamin content, judged as inadequate based on evaluations made during and after World War II of the ration's actual use by Army forces. There

1968-475: A secret protocol that defined German and Soviet "spheres of influence" (western Poland and Lithuania for Germany; eastern Poland , Finland, Estonia , Latvia and Bessarabia for the Soviet Union), and raised the question of continuing Polish independence. The pact neutralised the possibility of Soviet opposition to a campaign against Poland and assured that Germany would not have to face the prospect of

2091-774: A similar pact and rejected ceding part of its territory to the Soviet Union. The Soviet Union invaded Finland in November 1939, and was subsequently expelled from the League of Nations for this crime of aggression. Despite overwhelming numerical superiority, Soviet military success during the Winter War was modest, and the Finno-Soviet war ended in March 1940 with some Finnish concessions of territory . In June 1940,

2214-636: A single filled one-quart canteen. No testing was done of men on extended patrols or with heavier individual loads of ammunition and water. At the end of the three days, the men were weighed, and as no abnormal weight loss was noted, the K-ration was deemed successful. These findings were later used in 1943 to support a decision to discontinue production of the Mountain ration and the Jungle ration . Both of these specialized rations had proved costlier to produce in their original form, and were intensely disliked by

2337-497: A small, round metal can painted green with black lettering, with a metal key (dubbed a "twist key" ) to open it, packaged in a roughly square 3 in ×  2 + 3 ⁄ 4  in ×  1 + 7 ⁄ 16  in (76 mm × 70 mm × 37 mm) cardboard box. The rest of the meal came packed neatly in a waxed paper or laminated cellophane pack. The pack always contained two packages of 8 rectangular K-1 or 4 square K-2 calorie -dense cracker biscuits each,

2460-478: A soldier marching over cleared roads in temperate climates. Nevertheless, one K-ration per man per day would remain the basis of issue, even for mountain troops fighting at high altitudes and infantrymen fighting in the thick jungles of Burma . Military personnel also supplemented with various other rations throughout the war such as with the C-ration when needed. The C-ration was the only ration comparable to

2583-752: A standard ration for the United States Armed Forces. The Tropical Bar saw action in Korea and Vietnam as an element of the "Sundries" kit (which also contained toiletries), before being declared obsolete. It briefly returned to use when it was included on board Apollo 15 in July 1971. In the late 1980s, the US Army's Natick Labs created a new high-temperature chocolate (dubbed the "Congo Bar" by researchers) that could withstand heat in excess of 140 °F (60 °C), using egg whites, giving it

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2706-531: A two-front war, as it had in World War   I. Immediately afterwards, Hitler ordered the attack to proceed on 26 August, but upon hearing that the United Kingdom had concluded a formal mutual assistance pact with Poland and that Italy would maintain neutrality, he decided to delay it. In response to British requests for direct negotiations to avoid war, Germany made demands on Poland, which served as

2829-536: A vital source of nutrition for the nation's troops. During the war years, the bulk of the Hershey Food Corporation's chocolate production was for the military. Between 1940 and 1945, an estimated three billion units of the specially formulated candy bars were distributed to soldiers around the world." The D ration was almost universally detested for its bitter taste by U.S. troops, and was often discarded instead of consumed when issued. Troops called

2952-418: A volume of 1.4 cubic feet (40 liters). Each crate contained 12 daily rations (each daily ration consisting of one Breakfast unit, one Dinner unit, and one Supper unit) for a total of 36 units per crate. They were packed one unit deep, three units wide (one of each unit), and twelve units long (all of the same unit type). The U.S. Army M1943 uniform had simplified, but large, pockets that were designed to hold

3075-462: The A-ration , consisting of fresh food; B-ration , consisting of packaged, unprepared food; C-ration , consisting of prepared, canned food; D-ration , consisting of military chocolate ; and emergency rations , intended for emergencies when other food or rations are unavailable. In 1941, Ancel Keys , a University of Minnesota physiologist , was assigned by the U.S. War Department to design

3198-526: The Allies and the Axis powers . Nearly all the world's countries —including all the great powers —participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war , blurring the distinction between military and civilian resources. Tanks and aircraft played major roles , with the latter enabling the strategic bombing of population centres and delivery of

3321-604: The Anglo-German Naval Agreement and the German–Polish declaration of non-aggression . The situation became a crisis in late August as German troops continued to mobilise against the Polish border. On 23 August the Soviet Union signed a non-aggression pact with Germany, after tripartite negotiations for a military alliance between France, the United Kingdom, and Soviet Union had stalled. This pact had

3444-689: The British Empire , with fighting in the Balkans , Mediterranean, and Middle East , the aerial Battle of Britain and the Blitz , and naval Battle of the Atlantic . Through a series of campaigns and treaties, Germany took control of much of continental Europe and formed the Axis alliance with Italy , Japan , and other countries. In June 1941, Germany led the European Axis in an invasion of

3567-644: The C-ration , later by similar canned rations such as the Meal, Combat, Individual (MCI), primarily to save additional cost of procurement and storage. In 1948, after introduction of improvements in the C-ration, the K-ration was declared obsolete; production contracts had long since terminated. Most existing K-ration stocks were declared surplus, and distributed to civilian feeding programs overseas. The K-ration originally came packed in an unbleached tan-colored rectangular cardstock box with black lettering. The outer box

3690-581: The German Revolution of 1918–1919 , and a democratic government, later known as the Weimar Republic , was created. The interwar period saw strife between supporters of the new republic and hardline opponents on both the political right and left. Italy, as an Entente ally, had made some post-war territorial gains; however, Italian nationalists were angered that the promises made by the United Kingdom and France to secure Italian entrance into

3813-853: The German invasion of Poland and the United Kingdom and France 's declaration of war on Germany two days later on 3 September 1939. Dates for the beginning of the Pacific War include the start of the Second Sino-Japanese War on 7 July 1937, or the earlier Japanese invasion of Manchuria , on 19 September 1931. Others follow the British historian A. J. P. Taylor , who stated that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously, and

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3936-576: The Italian mainland , and Allied offensives in the Pacific—cost the Axis powers their initiative and forced them into strategic retreat on all fronts. In 1944, the Western Allies invaded German-occupied France at Normandy , while the Soviet Union regained its territorial losses and pushed Germany and its allies westward. At the same time, Japan suffered reversals in mainland Asia, while the Allies crippled

4059-553: The Japanese Navy and captured key islands . The war in Europe concluded with the liberation of German-occupied territories ; the invasion of Germany by the Western Allies and the Soviet Union, culminating in the fall of Berlin to Soviet troops; Hitler's suicide ; and the German unconditional surrender on 8 May 1945 . Following the refusal of Japan to surrender on the terms of the Potsdam Declaration ,

4182-695: The League of Nations as a force to preserve peace. Both Italy and Ethiopia were member nations, but the League did little when the former clearly violated Article X of the League's Covenant . The United Kingdom and France supported imposing sanctions on Italy for the invasion, but the sanctions were not fully enforced and failed to end the Italian invasion. Italy subsequently dropped its objections to Germany's goal of absorbing Austria . When civil war broke out in Spain, Hitler and Mussolini lent military support to

4305-731: The Nationalist rebels , led by General Francisco Franco . Italy supported the Nationalists to a greater extent than the Nazis: Mussolini sent more than 70,000 ground troops, 6,000 aviation personnel, and 720 aircraft to Spain. The Soviet Union supported the existing government of the Spanish Republic . More than 30,000 foreign volunteers, known as the International Brigades , also fought against

4428-690: The Rome–Berlin Axis . A month later, Germany and Japan signed the Anti-Comintern Pact , which Italy joined the following year. The Kuomintang (KMT) party in China launched a unification campaign against regional warlords and nominally unified China in the mid-1920s, but was soon embroiled in a civil war against its former Chinese Communist Party (CCP) allies and new regional warlords . In 1931, an increasingly militaristic Empire of Japan , which had long sought influence in China as

4551-590: The Soviet–Japanese Neutrality Pact in April 1941. By contrast, the Germans were steadily making preparations for an attack on the Soviet Union, massing forces on the Soviet border. Hitler believed that the United Kingdom's refusal to end the war was based on the hope that the United States and the Soviet Union would enter the war against Germany sooner or later. On 31 July 1940, Hitler decided that

4674-598: The Stresa Front in April 1935 in order to contain Germany, a key step towards military globalisation ; however, that June, the United Kingdom made an independent naval agreement with Germany, easing prior restrictions. The Soviet Union, concerned by Germany's goals of capturing vast areas of Eastern Europe , drafted a treaty of mutual assistance with France. Before taking effect, though, the Franco-Soviet pact

4797-709: The Sudetenland , an area of Czechoslovakia with a predominantly ethnic German population. Soon the United Kingdom and France followed the appeasement policy of British Prime Minister Neville Chamberlain and conceded this territory to Germany in the Munich Agreement , which was made against the wishes of the Czechoslovak government, in exchange for a promise of no further territorial demands. Soon afterwards, Germany and Italy forced Czechoslovakia to cede additional territory to Hungary, and Poland annexed

4920-707: The Tanggu Truce was signed in 1933. Thereafter, Chinese volunteer forces continued the resistance to Japanese aggression in Manchuria , and Chahar and Suiyuan . After the 1936 Xi'an Incident , the Kuomintang and CCP forces agreed on a ceasefire to present a united front to oppose Japan. The Second Italo-Ethiopian War was a brief colonial war that began in October 1935 and ended in May 1936. The war began with

5043-626: The Texas border, and at other bases throughout the United States . Some of the bars even found their way into the supplies for Admiral Richard E. Byrd 's third Antarctic expedition. These field tests were successful, and the Army began making irregular orders for the bars. After the attack on Pearl Harbor , the bars were ordered to be packaged to make them poison gas -proof. The bars' boxes were covered with an anti-gas coating and were packed 12 to

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5166-579: The Trans-Olza region of Czechoslovakia. Although all of Germany's stated demands had been satisfied by the agreement, privately Hitler was furious that British interference had prevented him from seizing all of Czechoslovakia in one operation. In subsequent speeches Hitler attacked British and Jewish "war-mongers" and in January 1939 secretly ordered a major build-up of the German navy to challenge British naval supremacy. In March 1939, Germany invaded

5289-558: The Treaty of Craiova . The loss of one-third of Romania's 1939 territory caused a coup against King Carol II, turning Romania into a fascist dictatorship under Marshal Ion Antonescu , with a course set towards the Axis in the hopes of a German guarantee. Meanwhile, German-Soviet political relations and economic co-operation gradually stalled, and both states began preparations for war. In April 1940, Germany invaded Denmark and Norway to protect shipments of iron ore from Sweden , which

5412-749: The United Kingdom and France to declare war on Germany. Poland was divided between Germany and the Soviet Union under the Molotov–Ribbentrop Pact , in which they had agreed on " spheres of influence " in Eastern Europe. In 1940, the Soviets annexed the Baltic states and parts of Finland and Romania . After the fall of France in June 1940, the war continued mainly between Germany and

5535-709: The Wehrmacht rapidly advanced to the Channel and cut off the Allied forces in Belgium, trapping the bulk of the Allied armies in a cauldron on the Franco-Belgian border near Lille. The United Kingdom was able to evacuate a significant number of Allied troops from the continent by early June, although they had to abandon almost all their equipment. On 10 June, Italy invaded France , declaring war on both France and

5658-451: The aftermath of World War I and the rise of fascism in Europe and militarism in Japan . Key events leading up to the war included Japan's invasion of Manchuria , the Spanish Civil War , the outbreak of the Second Sino-Japanese War , and Germany's annexations of Austria and the Sudetenland . World War II is generally considered to have begun on 1 September 1939, when Nazi Germany , under Adolf Hitler , invaded Poland , prompting

5781-543: The only two nuclear weapons ever used in war. World War II was the deadliest conflict in history, resulting in 70 to 85 million deaths , more than half being civilians. Millions died in genocides , including the Holocaust of European Jews, as well as from massacres, starvation, and disease. Following the Allied powers' victory, Germany , Austria , Japan , and Korea were occupied, and war crimes tribunals were conducted against German and Japanese leaders . The causes of World War II included unresolved tensions in

5904-404: The reunification of East and West Germany to take place and resolved most post–World War   II issues. No formal peace treaty between Japan and the Soviet Union was ever signed, although the state of war between the two countries was terminated by the Soviet–Japanese Joint Declaration of 1956 , which also restored full diplomatic relations between them. World War I had radically altered

6027-415: The "paratrooper ration", since paratroopers were the first to be issued the ration on an experimental basis. The actual prototype of the K-ration was a pocket ration for paratroopers developed by the Subsistence Research Laboratory (SRL) at the request of the U.S. Army Air Forces (USAAF) early in the war. Two original samples (one version used pemmican biscuits, a peanut bar, raisins, and bouillon paste;

6150-409: The Allies were attempting to cut off . Denmark capitulated after six hours , and despite Allied support , Norway was conquered within two months. British discontent over the Norwegian campaign led to the resignation of Prime Minister Neville Chamberlain , who was replaced by Winston Churchill on 10   May 1940. On the same day, Germany launched an offensive against France . To circumvent

6273-412: The Army's Subsistence Branch staff of the Quartermaster Corps, who had to secure additional supply contracts and storage facilities for the new rations. Though the K-ration was designed to be an emergency ration, Quartermaster Corps officials would continue to insist until the end of the war that the K-ration would satisfy all requirements for a lightweight complete field ration for all front-line troops at

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6396-400: The Axis war against the Soviet Union, in Romania's case partially to recapture territory ceded to the Soviet Union . In early June 1940, the Italian Regia Aeronautica attacked and besieged Malta , a British possession. From late summer to early autumn, Italy conquered British Somaliland and made an incursion into British-held Egypt . In October, Italy attacked Greece , but the attack

6519-421: The Blitz , but largely ended in May 1941 after failing to significantly disrupt the British war effort. Using newly captured French ports, the German Navy enjoyed success against an over-extended Royal Navy , using U-boats against British shipping in the Atlantic . The British Home Fleet scored a significant victory on 27   May 1941 by sinking the German battleship Bismarck . In November 1939,

6642-461: The D ration "Hitler's Secret Weapon" for its effect on soldiers' intestinal tracts. It could not be eaten at all by soldiers with poor dentition, and even those with good teeth often found it necessary to first shave slices off the bar with a knife before consuming. In 1943, the Procurement Division of the Army approached Hershey about producing a confectionery-style chocolate bar with improved flavor that would still withstand extreme heat for issue in

6765-408: The D ration bar. Colonel Logan had four requirements for the D ration bar, dictating that it had to: Its ingredients were chocolate, sugar, oatmeal , cacao fat , skim milk powder , and artificial flavoring , fortified with vitamin B1 to prevent beriberi . Chocolate manufacturing equipment was assembled to move the flowing mixture of liquid chocolate and oat flour into preset molds. However, it

6888-405: The European Axis declaring war on the US. Japan conquered much of coastal China and Southeast Asia , but its advances in the Pacific were halted in mid-1942 after its defeat in the naval Battle of Midway ; Germany and Italy were defeated in North Africa and at Stalingrad in the Soviet Union. Key setbacks in 1943—including German defeats on the Eastern Front, the Allied invasions of Sicily and

7011-412: The European theater noted that none of the packaged rations were recommended for continued use by active troops for periods in excess of 10 days. A survey of troops in the forward areas and evacuation hospitals of the Fifth U.S. Army serving in the Italian campaign noted that almost all soldiers questioned in infantry, engineer, and other mobile forward units said they had lost weight since the beginning of

7134-410: The French possessions of Syria and Lebanon , assisted by the Free French . With the situation in Europe and Asia relatively stable, Germany, Japan, and the Soviet Union made preparations for war. With the Soviets wary of mounting tensions with Germany, and the Japanese planning to take advantage of the European War by seizing resource-rich European possessions in Southeast Asia , the two powers signed

7257-426: The Germans, and the last large operational unit of the Polish Army surrendered on 6   October . Despite the military defeat, Poland never surrendered; instead, it formed the Polish government-in-exile and a clandestine state apparatus remained in occupied Poland. A significant part of Polish military personnel evacuated to Romania and Latvia; many of them later fought against the Axis in other theatres of

7380-432: The Italian campaign. Surgeons commented upon a noticeable decrease in body fat and wasting of muscle, requiring copious feeding and rest, as well as ascorbic acid (Vitamin C). The K-ration was also criticized for its performance in the China-Burma-India (CBI) theater of operations, where difficulties in supply from bases in India had resulted in widespread and monotonous use of the K-ration for light infantry forces of

7503-427: The K-ration in widespread issue, with six cans comprising one full ration. Introduced in 1938 it was significantly heavier, with less variety in meals, but had more protein. While fighting in the European Theater of Operations , the US Army discovered that troops also quickly got tired of the K-ration, some being forced to eat it for days, or rarely, in excess of a week on end. As it was based on an emergency ration,

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7626-450: The Nationalists. Both Germany and the Soviet Union used this proxy war as an opportunity to test in combat their most advanced weapons and tactics. The Nationalists won the civil war in April 1939; Franco, now dictator, remained officially neutral during World War   II but generally favoured the Axis . His greatest collaboration with Germany was the sending of volunteers to fight on the Eastern Front . In July 1937, Japan captured

7749-445: The Pacific Theater. After a short period of experimentation, the Hershey company began producing Hershey's Tropical Bar. The bar was designed for issue with field and specialty rations, such as the K ration , and originally came in 1-ounce (28 g) and 2-ounce (56 g) sizes. After 1945, it came in 4-ounce (112 g) D ration sizes as well. The Tropical Bar (it was called the D ration throughout the war, despite its new appellation) had more of

7872-452: The Royal Navy putting three Italian battleships out of commission after a carrier attack at Taranto , and neutralising several more warships at the Battle of Cape Matapan . Italian defeats prompted Germany to deploy an expeditionary force to North Africa; at the end of March 1941, Rommel 's Afrika Korps launched an offensive which drove back Commonwealth forces. In less than a month, Axis forces advanced to western Egypt and besieged

7995-423: The Soviet Union occupied the entire territories of Estonia, Latvia and Lithuania, as well as the Romanian regions of Bessarabia, Northern Bukovina, and the Hertsa region . In August 1940, Hitler imposed the Second Vienna Award on Romania which led to the transfer of Northern Transylvania to Hungary. In September 1940, Bulgaria demanded Southern Dobruja from Romania with German and Italian support, leading to

8118-421: The Soviet Union , opening the Eastern Front and initially making large territorial gains. Japan aimed to dominate East Asia and the Asia-Pacific , and by 1937 was at war with the Republic of China . In December 1941, Japan attacked American and British territories in Southeast Asia and the Central Pacific , including Pearl Harbor in Hawaii , which resulted in the US and the UK declaring war against Japan, and

8241-418: The Soviet Union and Mongolia . The Japanese doctrine of Hokushin-ron , which emphasised Japan's expansion northward, was favoured by the Imperial Army during this time. This policy would prove difficult to maintain in light of the Japanese defeat at Khalkin Gol in 1939, the ongoing Second Sino-Japanese War and ally Nazi Germany pursuing neutrality with the Soviets. Japan and the Soviet Union eventually signed

8364-575: The Soviet Union should be eliminated and aimed for the conquest of Ukraine , the Baltic states and Byelorussia . However, other senior German officials like Ribbentrop saw an opportunity to create a Euro-Asian bloc against the British Empire by inviting the Soviet Union into the Tripartite Pact. In November 1940, negotiations took place to determine if the Soviet Union would join the pact. The Soviets showed some interest but asked for concessions from Finland, Bulgaria, Turkey, and Japan that Germany considered unacceptable. On 18 December 1940, Hitler issued

8487-651: The Tropical Bar. Their continued efforts resulted in four stars being added to their pennant signifying the five times they received this distinction. U.S. propaganda used this product distinction during the war as a message "that Allied nations would win the war because of their democratic institutions, but also because of the productivity of the U.S. economy and, especially, its agriculture." In tandem with this state-sponsored rhetoric, radio advertisements for foodstuffs and other consumer goods employed wartime slogans to reinforce military campaigns against Germany and Japan. The rhetoric of war rations aligned food consumption with

8610-402: The US dropped the first atomic bombs on Hiroshima and Nagasaki on 6 and 9 August. Faced with an imminent invasion of the Japanese archipelago , the possibility of further atomic bombings, and the Soviet declaration of war against Japan and its invasion of Manchuria , Japan announced its unconditional surrender on 15 August and signed a surrender document on 2 September 1945 , marking

8733-424: The United Kingdom and France guaranteed their support for Polish independence ; when Italy conquered Albania in April 1939, the same guarantee was extended to the Kingdoms of Romania and Greece . Shortly after the Franco - British pledge to Poland, Germany and Italy formalised their own alliance with the Pact of Steel . Hitler accused the United Kingdom and Poland of trying to "encircle" Germany and renounced

8856-542: The United Kingdom attacked on 3   July in an attempt to prevent its seizure by Germany. The air Battle of Britain began in early July with Luftwaffe attacks on shipping and harbours . The German campaign for air superiority started in August but its failure to defeat RAF Fighter Command forced the indefinite postponement of the proposed German invasion of Britain . The German strategic bombing offensive intensified with night attacks on London and other cities in

8979-461: The United Kingdom. The Germans turned south against the weakened French army, and Paris fell to them on 14   June. Eight days later France signed an armistice with Germany ; it was divided into German and Italian occupation zones , and an unoccupied rump state under the Vichy Regime , which, though officially neutral, was generally aligned with Germany. France kept its fleet, which

9102-549: The United States Army was the Field Ration D or Ration, Type D, commonly known as the "D ration." Army Quartermaster Colonel Paul Logan approached Hershey's Chocolate in April 1937, and met with William Murrie, the company president, and Sam Hinkle, the chief chemist . Milton Hershey was interested in the project when he was informed of the proposal, and the meeting began the first experimental production of

9225-660: The United States was assisting China and the Western Allies, and had amended the Neutrality Act to allow "cash and carry" purchases by the Allies. In 1940, following the German capture of Paris, the size of the United States Navy was significantly increased . In September the United States further agreed to a trade of American destroyers for British bases . Still, a large majority of the American public continued to oppose any direct military intervention in

9348-659: The United States, as well as Nationalist China and the United Kingdom . Many soldiers, including the U.S. unit known as Merrill's Marauders and British Chindit forces in Burma, had for five months lived primarily on K-rations, supplemented by rice, tea, sugar, jam, bread, and canned meat rations, which were dropped to them by air. In the case of the Marauders, whose diet consisted of 80% K-rations, severe weight loss (an average of 35 pounds or 16 kilograms per man) and vitamin deficiency were noted, which may have also contributed to

9471-606: The Yellow River ; this manoeuvre bought time for the Chinese to prepare their defences at Wuhan , but the city was taken by October. Japanese military victories did not bring about the collapse of Chinese resistance that Japan had hoped to achieve; instead, the Chinese government relocated inland to Chongqing and continued the war. In the mid-to-late 1930s, Japanese forces in Manchukuo had sporadic border clashes with

9594-547: The calorie and vitamin content. In 1943, a ration board headed by the chief of the Nutrition Branch, Office of the Chief Surgeon, was appointed and directed to conduct comprehensive field tests on rations which would be used later in combat. In the first of these field tests it was noted that troops remained in reasonably good physical condition during a 10-day period on C, K, and five-in-one rations but that

9717-517: The capital Nanking in December 1937. After the fall of Nanking, tens or hundreds of thousands of Chinese civilians and disarmed combatants were murdered by the Japanese . In March 1938, Nationalist Chinese forces won their first major victory at Taierzhuang , but then the city of Xuzhou was taken by the Japanese in May. In June 1938, Chinese forces stalled the Japanese advance by flooding

9840-403: The conflict well into 1941. In December 1940, Roosevelt accused Hitler of planning world conquest and ruled out any negotiations as useless, calling for the United States to become an " arsenal of democracy " and promoting Lend-Lease programmes of military and humanitarian aid to support the British war effort; Lend-Lease was later extended to the other Allies, including the Soviet Union after it

9963-526: The creation of a " New Roman Empire ". Adolf Hitler , after an unsuccessful attempt to overthrow the German government in 1923, eventually became the Chancellor of Germany in 1933 when Paul von Hindenburg and the Reichstag appointed him. Following Hindenburg's death in 1934, Hitler proclaimed himself Führer of Germany and abolished democracy, espousing a radical, racially motivated revision of

10086-477: The directive to prepare for an invasion of the Soviet Union. K ration The K-ration was a United States military ration consisting of three separately boxed meal units: breakfast , dinner , and supper . It was originally intended as an individually packaged daily ration for issue to airborne troops , tank crews, motorcycle couriers , and other mobile forces for short durations. The K-ration differs from other American alphabetized rations such as

10209-757: The dissolution of the Austro-Hungarian, Ottoman, and Russian Empires. To prevent a future world war, the League of Nations was established in 1920 by the Paris Peace Conference . The organisation's primary goals were to prevent armed conflict through collective security, military, and naval disarmament , as well as settling international disputes through peaceful negotiations and arbitration. Despite strong pacifist sentiment after World War   I , irredentist and revanchist nationalism had emerged in several European states. These sentiments were especially marked in Germany because of

10332-662: The end of May completed the German conquest of the Balkans. Partisan warfare subsequently broke out against the Axis occupation of Yugoslavia , which continued until the end of the war. In the Middle East in May, Commonwealth forces quashed an uprising in Iraq which had been supported by German aircraft from bases within Vichy-controlled Syria . Between June and July, British-led forces invaded and occupied

10455-511: The end of the war. World War II changed the political alignment and social structure of the world, and it set the foundation of international relations for the rest of the 20th century and into the 21st century. The United Nations was established to foster international cooperation and prevent conflicts, with the victorious great powers—China, France, the Soviet Union, the UK, and the US—becoming

10578-575: The first step of what its government saw as the country's right to rule Asia , staged the Mukden incident as a pretext to invade Manchuria and establish the puppet state of Manchukuo . China appealed to the League of Nations to stop the Japanese invasion of Manchuria. Japan withdrew from the League of Nations after being condemned for its incursion into Manchuria. The two nations then fought several battles, in Shanghai , Rehe and Hebei , until

10701-519: The flavor were made, the heat-resistant chocolate bars never received enthusiastic reviews. Emergency ration chocolate bars were made to be high in energy value, easy to carry, and able to withstand high temperatures. Withstanding high temperatures was critical since infantrymen would often be outdoors, sometimes in tropical or desert conditions, with the bars located close to their bodies. These conditions would cause typical chocolate bars to melt within minutes. The first chocolate ration bar commissioned by

10824-688: The foods incorporated, as well as the light weight. However, testing in extreme climatic and operating environments was extremely limited: in jungle testing, for example, the K-ration was evaluated in Panama by paratroopers and the Panama Jungle Test Platoon in an experiment lasting only three days. Marching was done not through jungle, as might be expected, but only on flat or gently rolling terrain on cleared roads, for an average of only 11 miles (18 km) per day. The test platoons carried one K-ration, weapon, poncho, shelter half , and

10947-864: The former Chinese imperial capital of Peking after instigating the Marco Polo Bridge incident , which culminated in the Japanese campaign to invade all of China. The Soviets quickly signed a non-aggression pact with China to lend materiel support, effectively ending China's prior cooperation with Germany . From September to November, the Japanese attacked Taiyuan , engaged the Kuomintang Army around Xinkou , and fought Communist forces in Pingxingguan . Generalissimo Chiang Kai-shek deployed his best army to defend Shanghai , but after three months of fighting, Shanghai fell. The Japanese continued to push Chinese forces back, capturing

11070-463: The fruit powder component of C- and K-rations with a source of ascorbic acid that would guarantee the utilization of this nutrient was recommended, as the current diet of troops operating on individual rations in the field was almost wholly devoid of ascorbic acid. By war's end, millions of K-rations had been produced, but the army had lost interest in them. Postwar Army supply plans for field rations relied solely on heavier canned wet rations, initially

11193-525: The invasion of the Ethiopian Empire (also known as Abyssinia ) by the armed forces of the Kingdom of Italy ( Regno d'Italia ), which was launched from Italian Somaliland and Eritrea . The war resulted in the military occupation of Ethiopia and its annexation into the newly created colony of Italian East Africa ( Africa Orientale Italiana , or AOI); in addition it exposed the weakness of

11316-438: The other used pemmican biscuits, a small D ration bar, canned processed meat, and lemon beverage powder) evolved into the one-package breakfast-dinner-supper combination later adopted as standard. The Quartermaster Command 's Subsistence Branch altered some components and renamed the ration the Field Ration, Type K, or "K-ration"; the final version totaled 2,830 kilocalories (11,800 kJ). The first procurement of K-rations

11439-502: The permanent members of its security council . The Soviet Union and the United States emerged as rival superpowers , setting the stage for the Cold War . In the wake of European devastation, the influence of its great powers waned, triggering the decolonisation of Africa and Asia . Most countries whose industries had been damaged moved towards economic recovery and expansion . World War II began in Europe on 1 September 1939 with

11562-589: The political European map with the defeat of the Central Powers —including Austria-Hungary , Germany , Bulgaria , and the Ottoman Empire —and the 1917 Bolshevik seizure of power in Russia , which led to the founding of the Soviet Union. Meanwhile, the victorious Allies of World War I , such as France, Belgium, Italy, Romania, and Greece, gained territory, and new nation-states were created out of

11685-599: The port of Tobruk . By late March 1941, Bulgaria and Yugoslavia signed the Tripartite Pact ; however, the Yugoslav government was overthrown two days later by pro-British nationalists. Germany and Italy responded with simultaneous invasions of both Yugoslavia and Greece , commencing on 6 April 1941; both nations were forced to surrender within the month. The airborne invasion of the Greek island of Crete at

11808-481: The ration soon appeared among the latter groups after the first few trades. In the China-Burma-India Theater of Operations (CBI), the D ration or Tropical Bar did make one group of converts: it was known as the "dysentery ration", since the bar was the only ration those ill with dysentery could tolerate. In 1957, the bar's formula was changed to make it more appetizing. The unpopular oat flour

11931-414: The rations were deficient in calories, especially for large men. The report listed the following recommendations: The use of the D ration as a supplement only; the further restriction of the use of C and K-rations to five-day periods unless supplemented; and the replacement of the wholly unsatisfactory dextrose and malted tablets of the K-ration with a more acceptable substitute. Additionally, replacement of

12054-722: The remainder of Czechoslovakia and subsequently split it into the German Protectorate of Bohemia and Moravia and a pro-German client state , the Slovak Republic . Hitler also delivered an ultimatum to Lithuania on 20 March 1939, forcing the concession of the Klaipėda Region , formerly the German Memelland . Greatly alarmed and with Hitler making further demands on the Free City of Danzig ,

12177-562: The remainder of the production run was packaged in a "desert camo" wrapper and was dubbed the Desert Bar . It proved a brief novelty but Hershey declined to make more after supplies ran out. World War II Asia-Pacific Mediterranean and Middle East Other campaigns Coups World War II or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions:

12300-419: The sight of a box of K-rations carried by the visitors, two of Wingate's men vomited. The unpalatable nature of some of the K-ration's components, such as the fatty pork loaf or the highly acidic lemon powder, caused many users to throw them away, further reducing actual consumed calorific content. Often, a secondary food source was issued, such as a D-ration bar, or fresh oranges , in an attempt to bring up

12423-410: The significant territorial, colonial, and financial losses imposed by the Treaty of Versailles . Under the treaty, Germany lost around 13 percent of its home territory and all its overseas possessions , while German annexation of other states was prohibited, reparations were imposed, and limits were placed on the size and capability of the country's armed forces . The German Empire was dissolved in

12546-498: The start or prelude to World War II. The exact date of the war's end also is not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 15 August 1945 ( V-J Day ), rather than with the formal surrender of Japan on 2 September 1945, which officially ended the war in Asia . A peace treaty between Japan and the Allies was signed in 1951. A 1990 treaty regarding Germany's future allowed

12669-593: The strong Maginot Line fortifications on the Franco-German border, Germany directed its attack at the neutral nations of Belgium , the Netherlands , and Luxembourg . The Germans carried out a flanking manoeuvre through the Ardennes region, which was mistakenly perceived by the Allies as an impenetrable natural barrier against armoured vehicles. By successfully implementing new Blitzkrieg tactics,

12792-585: The two wars became World War II in 1941. Other proposed starting dates for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War   II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939. Others view the Spanish Civil War as

12915-409: The war in Europe and Asia but also with the vitality of U.S. agriculture and consumerism . While these campaigns aimed to conserve U.S. food surpluses for the purpose of providing food aid to overseas militaries and civilian populations, they also functioned to jettison certain foodstuffs. Production of the D ration bar was discontinued at the end of World War II. However, Hershey's Tropical Bar remained

13038-513: The war were not fulfilled in the peace settlement. From 1922 to 1925, the Fascist movement led by Benito Mussolini seized power in Italy with a nationalist, totalitarian , and class collaborationist agenda that abolished representative democracy, repressed socialist, left-wing, and liberal forces, and pursued an aggressive expansionist foreign policy aimed at making Italy a world power, promising

13161-475: The war. Germany annexed western Poland and occupied central Poland ; the Soviet Union annexed eastern Poland ; small shares of Polish territory were transferred to Lithuania and Slovakia . On 6 October, Hitler made a public peace overture to the United Kingdom and France but said that the future of Poland was to be determined exclusively by Germany and the Soviet Union. The proposal was rejected and Hitler ordered an immediate offensive against France, which

13284-512: The west halted the German advance for several days, but it was outflanked and encircled by the Wehrmacht . Remnants of the Polish army broke through to besieged Warsaw . On 17 September 1939, two days after signing a cease-fire with Japan , the Soviet Union invaded Poland under the supposed pretext that the Polish state had ceased to exist. On 27 September, the Warsaw garrison surrendered to

13407-707: The world order , and soon began a massive rearmament campaign . France, seeking to secure its alliance with Italy, allowed Italy a free hand in Ethiopia , which Italy desired as a colonial possession. The situation was aggravated in early 1935 when the Territory of the Saar Basin was legally reunited with Germany, and Hitler repudiated the Treaty of Versailles, accelerated his rearmament programme, and introduced conscription. The United Kingdom, France and Italy formed

13530-605: The world. In 1939, the Hershey plant was capable of producing 100,000 ration bars a day. By the end of World War II, the entire Hershey plant was producing ration bars at a rate of 24 million a week. For their service throughout World War II, the Hershey Chocolate Company was issued the Army-Navy ‘E’ Award for Excellence for exceeding expectations for quality and quantity in the production of the D ration and

13653-614: Was invaded by Germany. The United States started strategic planning to prepare for a full-scale offensive against Germany. At the end of September 1940, the Tripartite Pact formally united Japan, Italy, and Germany as the Axis powers . The Tripartite Pact stipulated that any country—with the exception of the Soviet Union—that attacked any Axis Power would be forced to go to war against all three. The Axis expanded in November 1940 when Hungary , Slovakia , and Romania joined. Romania and Hungary later made major contributions to

13776-427: Was a thick rectangular bar that was square at each end. (In tropical regions , the K ration used Hershey's Tropical Bar formula.) When provided as an emergency field ration , military chocolate was very different from normal bars. Since its intended use was as an emergency food source, it was formulated so that it would not be a tempting treat that troops might consume before they needed it. Even as attempts to improve

13899-463: Was also a danger of over-reliance, which could cause the three meals to become monotonous if issued for long periods of time. The K-ration allowance was one ration per man per day (breakfast, dinner and supper), because of the short duration and hasty nature of experimental testing of the K-ration before adoption. Ration planners did not realize that soldiers fighting, digging, and marching in extreme conditions would require many more calories per day than

14022-449: Was found that the temperature-resistant formula became a gooey paste that would not flow at any temperature. Hinkle was forced to develop entirely new production methods to produce the bars. Each four-ounce portion had to be kneaded, weighed, and pressed into a mold by hand. The end result was an extremely hard block of dark brown chocolate that would crumble with some effort and was heat-resistant to 120 °F (49 °C). The resultant bar

14145-413: Was made in May 1942. Some believed the K-ration was named after Dr. Keys or was short for "Commando" (as elite troops were the first to receive it). However, the letter "K" was selected because it was phonetically distinct from other letter-name rations. The K-ration first saw use in 1942, when it was issued to U.S. Airborne troops on an experimental basis. Initial reports praised it for the variety of

14268-411: Was marked with an olive drab capital "S" on the ends. The packaging commencing with the earliest version of the ration consisted of a chemically treated cardboard outer carton and a waterproofed waxed-cardboard inner carton to protect the contents from contamination or damage. The waxed carton was found useful by soldiers to start small fires in which to boil water for coffee or cocoa. The entrée came in

14391-445: Was originally intended as an "assault" ration to be issued for short durations, the K-ration was designed to be used for a maximum of 15 meals. The K-ration was mass-produced by several major U.S. food production companies, including the H. J. Heinz Company, Patten Food Products Company and The Cracker Jack Company. K-ration crates were either wood (43 pounds or 20 kilograms each) or fiberboard (41 pounds or 19 kilograms each) and had

14514-456: Was postponed until the spring of 1940 due to bad weather. After the outbreak of war in Poland, Stalin threatened Estonia , Latvia , and Lithuania with military invasion, forcing the three Baltic countries to sign pacts allowing the creation of Soviet military bases in these countries; in October 1939, significant Soviet military contingents were moved there. Finland refused to sign

14637-424: Was printed on its top in bold capital sans serif block letter type with the text: "US ARMY FIELD RATION K", with the meal unit type (BREAKFAST, DINNER, or SUPPER UNIT) printed underneath it and a capital letter on each end (B, D, or S). While it was intended that the three meals be eaten in their named order, they were not always consumed in this manner. The inner box had the meal unit type printed across its top and

14760-404: Was removed, non-fat milk solids replaced skim milk powder, cocoa powder replaced cacao fat, and artificial vanilla flavoring was added. It was added with the help of sugar. It greatly improved the flavor of the bar, but it was still difficult to chew. It is estimated that between 1940 and 1945, over 3 billion of the D ration and Tropical Bars were produced and distributed to soldiers throughout

14883-772: Was repulsed with heavy Italian casualties; the campaign ended within months with minor territorial changes. To assist Italy and prevent Britain from gaining a foothold, Germany prepared to invade the Balkans, which would threaten Romanian oil fields and strike against British dominance of the Mediterranean. In December 1940, British Empire forces began counter-offensives against Italian forces in Egypt and Italian East Africa . The offensives were successful; by early February 1941, Italy had lost control of eastern Libya, and large numbers of Italian troops had been taken prisoner. The Italian Navy also suffered significant defeats, with

15006-557: Was required to go through the bureaucracy of the League of Nations, which rendered it essentially toothless. The United States, concerned with events in Europe and Asia, passed the Neutrality Act in August of the same year. Hitler defied the Versailles and Locarno Treaties by remilitarising the Rhineland in March 1936, encountering little opposition due to the policy of appeasement . In October 1936, Germany and Italy formed

15129-554: Was wrapped in aluminum foil and placed in a cardboard carton. Three bars made up a daily ration and was intended to furnish the individual combat soldier with the 1,800 calories (7,500 kJ) minimum sustenance recommended each day. Logan was pleased with the first small batch of samples. In June 1937, the United States Army ordered 90,000 "Logan Bars" and field tested them at bases in the Philippines , Panama , on

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