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80-401: Tents range in size from " bivouac " structures, just big enough for one person to sleep in, up to huge circus tents capable of seating thousands of people. Tents for recreational camping fall into two categories. Tents intended to be carried by backpackers are the smallest and lightest type. Small tents may be sufficiently light that they can be carried for long distances on a touring bicycle ,

160-481: A boat , or when backpacking . The second type are larger, heavier tents which are usually carried in a car or other vehicle. Depending on tent size and the experience of the person or people involved, such tents can usually be assembled (pitched) in between 5 and 25 minutes; disassembly (striking) takes a similar length of time. Some very specialised tents have spring-loaded poles and can be pitched in seconds, but take somewhat longer to strike (take down and pack). Over

240-405: A bivouac shelter. The most common method is to use one bivouac sheet as the roof of the shelter and a second as the groundsheet. The 'roof' flysheet is suspended along its ridge line by a cord tied between two trees which are a suitable distance apart. The four corners of the flysheet are then either pegged out or tied down to other trees. Care must be taken to leave a gap between the ground and

320-492: A collapsible tent with provisions for air conditioning and heating. Camping is a popular form of recreation which often involves the use of tents. A tent is economical and practical because of its portability and low environmental impact. These qualities are necessary when used in the wilderness or backcountry. Tents are often used in humanitarian emergencies, such as war , earthquakes and fire . The primary choice of tents in humanitarian emergencies are canvas tents, because

400-609: A cotton canvas tent allows functional breathability while serving the purpose of temporary shelter. Tents distributed by organisations such as UNHCR are made by various manufacturers, depending on the region where the tents are deployed, as well as depending on the purpose. At times, however, these temporary shelters become a permanent or semi-permanent home, especially for displaced people living in refugee camps or shanty towns who can not return to their former home and for whom no replacement homes are made available. Tents have been increasingly used as shelter for homeless people in

480-478: A dramatic intensification of the pace of social changes, and was a crucial catalyst for the growth of left-wing politics . Mao Zedong urged the socialist camp not to fear nuclear war with the United States since, even if "half of mankind died, the other half would remain while imperialism would be razed to the ground and the whole world would become socialist." A distinctive feature of war since 1945

560-508: A few years. While conventional wisdom holds that casualties have increased in recent times due to technological improvements in warfare, this is not generally true. For instance, the Thirty Years' War (1618–1648) had about the same number of casualties per capita as World War I , although it was higher during World War II (WWII). That said, overall the number of casualties from war has not significantly increased in recent times. Quite to

640-434: A finding supported by other researchers. Keeley explains that early war raids were not well organized, as the participants did not have any formal training. Scarcity of resources meant defensive works were not a cost-effective way to protect the society against enemy raids. William Rubinstein wrote "Pre-literate societies, even those organized in a relatively advanced way, were renowned for their studied cruelty.'" Since

720-508: A general feature of animal social behavior. Some proponents of the idea argue that war, while innate, has been intensified greatly by developments of technology and social organization such as weaponry and states. Psychologist and linguist Steven Pinker argued that war-related behaviors may have been naturally selected in the ancestral environment due to the benefits of victory. He also argued that in order to have credible deterrence against other groups (as well as on an individual level), it

800-577: A military or civilian force to increase vigilance at an encampment. Following use by the troops of the British Empire the term became also known as bivvy for short. Artificial bivouacs can be constructed using a variety of available materials from corrugated iron sheeting or plywood , to groundsheets or a purpose-made basha . Although these have the advantage of being speedy to erect and resource-efficient, they have relatively poor insulation properties. There are many different ways to put up

880-497: A more comfortable, safer, and sturdier option to hanging hammocks. War War is an armed conflict between the armed forces of states , or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain military operations, or between such organized groups. It is generally characterized by extreme violence , destruction, and mortality, using regular or irregular military forces . Warfare refers to

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960-469: A noble cause is a contributing factor towards war, few wars have originated from a desire for war among the general populace. Far more often the general population has been reluctantly drawn into war by its rulers. One psychological theory that looks at the leaders is advanced by Maurice Walsh. He argues the general populace is more neutral towards war and wars occur when leaders with a psychologically abnormal disregard for human life are placed into power. War

1040-449: A slow chemical breakdown caused by ultraviolet light. The most common treatments to make fabric waterproof are silicone impregnation or polyurethane coating. Since stitching makes tiny holes in a fabric seams are often sealed or taped to block these holes and maintain waterproofness, though in practice a carefully sewn seam can be waterproof. Rain resistance is measured and expressed as hydrostatic head in millimetres (mm). This indicates

1120-609: A source of violent conflict. Pope Urban II in 1095, on the eve of the First Crusade , advocating Crusade as a solution to European overpopulation, said: For this land which you now inhabit, shut in on all sides by the sea and the mountain peaks, is too narrow for your large population; it scarcely furnishes food enough for its cultivators. Hence it is that you murder and devour one another, that you wage wars, and that many among you perish in civil strife. Let hatred, therefore, depart from among you; let your quarrels end. Enter upon

1200-403: A time of urgency was shown when the climber Hermann Buhl made his ascent of Nanga Parbat in 1953 and was forced to bivouac alone on a rock ledge at 8,000 metres (26,000 ft) altitude, in order to survive until the following morning. Modern bivouacs have evolved to offer heightened levels of comfort for climbers and explorers. Modern portaledges (the vertical camping version of a tent) are

1280-696: A very limited number of suppliers. Much like a bicycle tube and tire, airbeams are often composed of a highly dimensionally stable (i.e. no stretch) fabric sleeve and an air-holding inner bladder. However, other airbeam constructions consist of coated fabrics that are cut and manufactured to its intended shape by a method such as thermal welding. Depending on the desired tent size, airbeams can be anywhere from 2-40 inches in diameter, inflated to different pressures. High pressure airbeams (40-80 psi) that are filled by compressors are most often used in larger shelters, whereas low pressure beams (5-7 psi) are preferred for recreational use. The relatively low pressure enables

1360-560: A war". Tangible/intangible aims: Explicit/implicit aims: Positive/negative aims: War aims can change in the course of conflict and may eventually morph into "peace conditions" – the minimal conditions under which a state may cease to wage a particular war. Throughout the course of human history, the average number of people dying from war has fluctuated relatively little, being about 1 to 10 people dying per 100,000. However, major wars over shorter periods have resulted in much higher casualty rates, with 100–200 casualties per 100,000 over

1440-744: Is a Mesolithic cemetery in Jebel Sahaba , which has been determined to be about 13,400 years old. About forty-five percent of the skeletons there displayed signs of violent death, specifically traumatic bone lesions. In War Before Civilization , Lawrence H. Keeley , a professor at the University of Illinois , says approximately 90–95% of known societies throughout history engaged in at least occasional warfare, and many fought constantly. Keeley describes several styles of primitive combat such as small raids , large raids, and massacres . All of these forms of warfare were used by primitive societies,

1520-471: Is a waterproof layer which extends down to the ground all round. One or more 'inner tents' provide sleeping areas. The outer tent may be just a little larger than the inner tent, or it may be a lot larger and provide a covered living area separate from the sleeping area(s). An inner tent is not waterproof, but allows water vapour to pass through so that condensation occurs only on the exterior side. The double layer may also provide some thermal insulation . Either

1600-469: Is absolutely forbidden. The colloquial Saxon word boofen was derived from pofen (to sleep soundly and for a long time). Count Henry Russell-Killough , the "hermit of the Pyrenees ", is broadly accredited with the invention of the bivouac in extreme, inhospitable places. He would bivouac in the open, creating a blanket of rocks and earth or using a simple bag. An example of a bivouac being made in

1680-549: Is any of a variety of improvised camp site or shelter that is usually of a temporary nature, used especially by soldiers or people engaged in backpacking , bikepacking , scouting or mountain climbing . It may often refer to sleeping in the open with a bivouac sack, but it may also refer to a shelter constructed of natural materials like a structure of branches to form a frame, which is then covered with leaves , ferns and similar material for waterproofing and duff ( leaf litter ) for insulation . Modern bivouacs often involve

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1760-632: Is caused by leaders who seek war such as Napoleon and Hitler . Such leaders most often come to power in times of crisis when the populace opts for a decisive leader, who then leads the nation to war. Naturally, the common people don't want war; neither in Russia nor in England nor in America, nor for that matter in Germany. That is understood. But, after all, it is the leaders of the country who determine

1840-493: Is commonplace encourage their children to be more aggressive. War can be seen as a growth of economic competition in a competitive international system. In this view wars begin as a pursuit of markets for natural resources and for wealth. War has also been linked to economic development by economic historians and development economists studying state-building and fiscal capacity . While this theory has been applied to many conflicts, such counter arguments become less valid as

1920-620: Is estimated that between 1985 and 1994, 378,000 people per year died due to war. Most wars have resulted in significant loss of life, along with destruction of infrastructure and resources (which may lead to famine , disease, and death in the civilian population ). During the Thirty Years' War in Europe, the population of the Holy Roman Empire was reduced by 15 to 40 percent. Civilians in war zones may also be subject to war atrocities such as genocide , while survivors may suffer

2000-547: Is fueled by displacement and projection where a person transfers his or her grievances into bias and hatred against other races , religions , nations or ideologies . By this theory, the nation state preserves order in the local society while creating an outlet for aggression through warfare. The Italian psychoanalyst Franco Fornari , a follower of Melanie Klein , thought war was the paranoid or projective "elaboration" of mourning. Fornari thought war and violence develop out of our "love need": our wish to preserve and defend

2080-849: Is that combat has largely been a matter of civil wars and insurgencies. The major exceptions were the Korean War , the Indo-Pakistani War of 1971 , the Iran–Iraq War , the Gulf War , the Eritrean–Ethiopian War , and the Russo-Ukrainian War . The Human Security Report 2005 documented a significant decline in the number and severity of armed conflicts since the end of the Cold War in the early 1990s. However,

2160-643: Is the operative word. Experience indicates that camping may be more comfortable if the actual number of occupants is one or even two less than the manufacturer's suggestion, though different manufacturers have different standards for space requirement and there is no accepted standard. Tent used in areas with biting insects often have their vent and door openings covered with fine-mesh netting . Tents can be improvised using waterproof fabric, string, and sticks. There are three basic configurations of tents, each of which may appear with many variations: Single skin (USA: single wall) : Only one waterproof layer of fabric

2240-422: Is therefore a common choice for hikers, cyclists or climbers who have to camp in tight areas, or in unknown areas. A bivouac sack will usually have a thin waterproof fabric shell that is designed to slip over a sleeping bag , providing an additional 5 to 10 °C of insulation and forming an effective barrier against wind chill and rain . A drawback of a simple bivouac sack is the humidity that condenses on

2320-427: Is used, comprising at least roof and walls. To minimize condensation on the inside of the tent, some expedition tents use waterproof/breathable fabrics . Single skin with flysheet : A waterproof flysheet or rain fly is suspended over and clear of the roof of the tent; it often overlaps the tent roof slightly, but does not extend down the sides or ends of the tent. Double skin (USA: double wall) : The outer tent

2400-892: The American Civil War , including about 6% in the North and approximately 18% in the South. The war remains the deadliest conflict in American history, resulting in the deaths of 620,000 military personnel. United States military casualties of war since 1775 have totaled over two million. Of the 60 million European military personnel who were mobilized in World War I , 8 million were killed, 7 million were permanently disabled, and 15 million were seriously injured. During Napoleon 's retreat from Moscow, more French military personnel died of typhus than were killed by

2480-470: The Occupy movement , an international protest movement which is primarily directed against economic and social inequality. Occupy protesters use tents to create camps in public places wherein they can form communities of open discussion and democratic action. Generally, the interior of an enclosed tent is about 10 degrees Fahrenheit warmer than the outside environment (not accounting for wind chill ), due to

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2560-672: The Plains Indians since ancient times, variously estimated from 10,000 to 4,000 years BC. Tents were used at least as far back as the early Iron Age . They are mentioned in the Bible ; for example, in Genesis 4:20 Jabal is described as "the first to live in tents and raise sheep and goats ". The Roman Army used leather tents, copies of which have been used successfully by modern re-enactors. Various styles developed over time, some derived from traditional nomadic tents, such as

2640-489: The Soviet Union were around 27   million . Since a high proportion of those killed were young men who had not yet fathered any children, population growth in the postwar Soviet Union was much lower than it otherwise would have been. Once a war has ended, losing nations are sometimes required to pay war reparations to the victorious nations. In certain cases, land is ceded to the victorious nations. For example,

2720-818: The yurt . Most military tents throughout history were of a simple ridge design. The major technological advance was the use of linen or hemp canvas for the canopy versus leather for the Romans. The primary use of tents was still to provide portable shelter for a small number of men in the field. By World War I larger designs were being deployed in rear areas to provide shelter for support activities and supplies. Tents are used as habitation by nomads, recreational campers, soldiers, and disaster victims. Tents are also typically used as overhead shelter for festivals, weddings, backyard parties, major corporate events, excavation (construction) covers, and industrial shelters. Tents have traditionally been used by nomadic people all over

2800-678: The 11th-century Old English words wyrre and werre , from Old French werre (also guerre as in modern French), in turn from the Frankish * werra , ultimately deriving from the Proto-Germanic * werzō ' mixture, confusion ' . The word is related to the Old Saxon werran , Old High German werran , and the modern German verwirren , meaning ' to confuse, to perplex, to bring into confusion ' . The earliest evidence of prehistoric warfare

2880-676: The 1970s and 1980s anti-nuclear peace camps spread across Europe and North America, with the largest women's-only camp to date set up outside the RAF Greenham Common United States airbase in Newbury, England to protest the deployment there of cruise missiles during the Cold War . The 1990s saw environmental protest camps as part of the campaign for the Clayoquot Sound in Canada and the roads protests in

2960-638: The German region of Saxon Switzerland in the Elbe Sandstone Mountains , climbers refer to overnighting in the open air as Boofen (pronounced "bo-fen"). The spot selected for overnight stays usually comprises an overhang in the sandstone rock or a cave, the so-called Boofe ("bo-fe"). This has often been adapted with a sleeping area and fireplace. In the national park itself, Boofen is only permitted at designated sites and only in connection with climbing, although in this case lighting fires

3040-707: The Great Depression, though some consider that it did not play a very large role in the recovery, though it did help in reducing unemployment. In most cases, such as the wars of Louis XIV, the Franco-Prussian War , and World War I , warfare primarily results in damage to the economy of the countries involved. For example, Russia's involvement in World War I took such a toll on the Russian economy that it almost collapsed and greatly contributed to

3120-564: The Neanderthals and ancestors of apes and primates. For the period 3000 BCE until 1991, estimates range from 151   million to 2   billion. The deadliest war in history, in terms of the cumulative number of deaths since its start, is World War II , from 1939 to 1945, with 70–85 million deaths, followed by the Mongol conquests at up to 60 million. As concerns a belligerent's losses in proportion to its prewar population,

3200-705: The Russians. Of the 450,000 soldiers who crossed the Neman on 25 June 1812, less than 40,000 returned. More military personnel were killed from 1500 to 1914 by typhus than from military action. In addition, if it were not for modern medical advances there would be thousands more dead from disease and infection. For instance, during the Seven Years' War , the Royal Navy reported it conscripted 184,899 sailors, of whom 133,708 (72%) died of disease or were 'missing'. It

3280-622: The U.S. , especially California , Oregon , and Washington . Encampments spiked in the mid-to-late 2010s. These tent cities housing many homeless and travelers/ vagabonds have also, are also commonly found in major cities in the South, including Austin, Texas , which had passed a restriction on homeless encampments in May 2021. Tents are also often used as sites and symbols of protest over time. In 1968 Resurrection City saw hundreds of tents set up by anti-poverty campaigners in Washington D.C. In

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3360-577: The UK. The first No Border Network camp was held in Strasbourg in 2002, becoming the first in a series of international camps that continue to be organised today. Other international camps of the 2000s include summit counter-mobilisations like Horizone at the Gleneagles G8 gathering in 2005 and the start of Camp for Climate Action in 2006. Since September 2011, the tent has been used as a symbol of

3440-438: The United States and U.S. Generals , expressed support for an economic view of war. The Marxist theory of war is quasi-economic in that it states all modern wars are caused by competition for resources and markets between great ( imperialist ) powers, claiming these wars are a natural result of capitalism . Marxist economists Karl Kautsky , Rosa Luxemburg , Rudolf Hilferding and Vladimir Lenin theorized that imperialism

3520-415: The bottom edge of the fabric. These tents are usually so heavy (25 to 80 kg) that it takes a rather strong wind to blow them away. Flexible poles used for tents in this section are typically between 3 and 6 metres (9.8 and 19.7 ft) long. Cheap poles are made of tubes of fibreglass with an external diameter less than 1 cm ( 1 ⁄ 3  in), whereas more expensive aluminium alloys are

3600-988: The chances of becoming a psychiatric casualty – of being debilitated for some period of time as a consequence of the stresses of military life – were greater than the chances of being killed by enemy fire. Swank and Marchand's World War II study found that after sixty days of continuous combat, 98% of all surviving military personnel will become psychiatric casualties. Psychiatric casualties manifest themselves in fatigue cases, confusional states, conversion hysteria, anxiety, obsessional and compulsive states, and character disorders. One-tenth of mobilised American men were hospitalised for mental disturbances between 1942 and 1945, and after thirty-five days of uninterrupted combat, 98% of them manifested psychiatric disturbances in varying degrees. Additionally, it has been estimated anywhere from 18% to 54% of Vietnam war veterans suffered from posttraumatic stress disorder . Based on 1860 census figures, 8% of all white American males aged 13 to 43 died in

3680-495: The common activities and characteristics of types of war, or of wars in general. Total war is warfare that is not restricted to purely legitimate military targets , and can result in massive civilian or other non-combatant suffering and casualties . While some war studies scholars consider war a universal and ancestral aspect of human nature , others argue it is a result of specific socio-cultural, economic, or ecological circumstances. The English word war derives from

3760-778: The conflict, and increased revenues by weapons manufacturers . Three of the ten most costly wars, in terms of loss of life, have been waged in the last century. These are the two World Wars, followed by the Second Sino-Japanese War (which is sometimes considered part of World War II , or as overlapping). Most of the others involved China or neighboring peoples. The death toll of World War II, being over 60 million, surpasses all other war-death-tolls. Military personnel subject to combat in war often suffer mental and physical injuries, including depression, posttraumatic stress disorder , disease, injury, and death. In every war in which American soldiers have fought in,

3840-414: The contrary, on a global scale the time since WWII has been unusually peaceful. Estimates for total deaths due to war vary widely. In one estimate, primitive warfare from 50,000 to 3000 BCE has been thought to have claimed 400   million±133,000 victims based on the assumption that it accounted for the 15.1% of all deaths. Other scholars find the prehistoric percentage much lower, around 2%, similar to

3920-588: The evidence examined in the 2008 edition of the Center for International Development and Conflict Management's "Peace and Conflict" study indicated the overall decline in conflicts had stalled. Entities contemplating going to war and entities considering whether to end a war may formulate war aims as an evaluation/propaganda tool. War aims may stand as a proxy for national-military resolve. Fried defines war aims as "the desired territorial, economic, military or other benefits expected following successful conclusion of

4000-459: The increasing mobility of capital and information level the distributions of wealth worldwide, or when considering that it is relative, not absolute, wealth differences that may fuel wars. There are those on the extreme right of the political spectrum who provide support, fascists in particular, by asserting a natural right of a strong nation to whatever the weak cannot hold by force. Some centrist, capitalist, world leaders, including Presidents of

4080-409: The inner side, leaving the occupant or the sleeping bag moist. Moisture severely decreases the insulating effect of sleeping bags. This problem has been alleviated somewhat in recent years with the advent of more waterproof, but breathable fabrics , such as Gore-Tex , which allow some humidity to pass through the fabric while blocking most external water. A traditional bivouac bag typically cinches all

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4160-406: The manufacturer thinks can use the tent, though these numbers do not always allow for any personal belongings, such as luggage, inflatable mattresses, camp beds, cots, etc., nor do they always allow for people who are of above average height. Checking the quoted sizes of sleeping areas reveals that several manufacturers consider that a width of 150 cm (4.9 ft) is enough for three people; snug

4240-625: The material of choice for added strength and durability. For ease of transportation, these poles are made in sections some 30 to 60 cm (0.98 to 1.97 ft) long, with one end of each section having a socket into which the next section can fit. For ease of assembly, the sections for each pole are often connected by an internal elastic cord running the entire length of the pole. Inflatable pole supports, also known as airbeams, serve as rigid structural supports when inflated but are soft and pliable when deflated. Tents using such technology are neither commonly used nor widely accepted and are available from

4320-489: The military are temporary sleeping quarters (barracks); dining facilities (DFACs); field headquarters; morale, welfare, and recreation (MWR) facilities; and security checkpoints. One of the most popular military designs currently fielded is the TEMPER Tent, an acronym for Tent Expandable Modular PERsonnel. The United States Army is beginning to use a more modern tent called the deployable rapid assembly shelter or DRASH,

4400-505: The most destructive war in modern history may have been the Paraguayan War (see Paraguayan War casualties ). In 2013 war resulted in 31,000 deaths, down from 72,000 deaths in 1990. War usually results in significant deterioration of infrastructure and the ecosystem, a decrease in social spending, famine , large-scale emigration from the war zone, and often the mistreatment of prisoners of war or civilians. For instance, of

4480-542: The motivations for war, but no consensus about which are most common. Military theorist Carl von Clausewitz said, "Every age has its own kind of war, its own limiting conditions, and its own peculiar preconceptions." Dutch psychoanalyst Joost Meerloo held that, "War is often...a mass discharge of accumulated internal rage (where)...the inner fears of mankind are discharged in mass destruction." Other psychoanalysts such as E.F.M. Durban and John Bowlby have argued human beings are inherently violent. This aggressiveness

4560-599: The nature and presence of warfare. Thus, he argues, warfare is not a universal human occurrence and appears to have been a historical invention, associated with certain types of human societies. Montagu's argument is supported by ethnographic research conducted in societies where the concept of aggression seems to be entirely absent, e.g. the Chewong and Semai of the Malay peninsula. Bobbi S. Low has observed correlation between warfare and education, noting societies where warfare

4640-556: The next generation of tent design. Tent-style tensile structures are used to cover large public areas such as entertainment venues , arenas and retail areas (example: The O 2 ) or sports stadiums (example: Munich Olympic Stadium ) and airports (example: Denver International Airport ). The Sami Parliament of Norway is inspired by the lavvu, a tent traditionally used by the Sami people . Bivouac shelter A bivouac shelter or bivvy (alternately bivy , bivi , bivvi )

4720-529: The nine million people who were on the territory of the Byelorussian SSR in 1941, some 1.6 million were killed by the Germans in actions away from battlefields, including about 700,000 prisoners of war, 500,000 Jews, and 320,000 people counted as partisans (the vast majority of whom were unarmed civilians). Another byproduct of some wars is the prevalence of propaganda by some or all parties in

4800-656: The outer skin or the inner skin may be the structural component, carrying the poles; the structural skin is always pitched first, though some tents are built with the outer and inner linked so that they are both pitched at the same time. Components: Many factors affect tent design, including: Shelters are not normally used for sleeping. Instead they may act as a store or provide shelter from sun, rain, or dew. With modern materials, tent manufacturers have great freedom to vary types and styles and shapes of tents. Many tents which use rigid steel poles are free-standing and do not require guy ropes, though they may require pegs around

4880-436: The particular conditions of the location. (The word also sometimes refers to a special type of bivouac sack described below). A bivouac sack is a smaller type of bivouac shelter. Generally it is a portable, lightweight, waterproof shelter, and an alternative to larger bivouac shelters. The main benefit of a bivouac sack shelter is speed of setup and ability to use in a tiny space as compared to tent-like shelters. A bivouac sack

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4960-438: The past decade, tents have also been increasingly linked with homelessness crises in the United States , Canada , and other regions. Places of multiple homeless people living in tents closely pitched or plotted near each other are often referred to as tent cities . A form of tent called a teepee or tipi , noted for its cone shape and peak smoke hole , was also used by Native American tribes and Aboriginal Canadians of

5040-399: The policy and it is always a simple matter to drag the people along, whether it is a democracy or a fascist dictatorship or a Parliament or a Communist dictatorship. ... the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked and denounce the pacifists for lack of patriotism and exposing the country to danger. It works

5120-689: The pressure of water needed to penetrate a fabric. Heavy or wind-driven rain has a higher pressure than light rain. Standing on a groundsheet increases the pressure on any water underneath. Fabric with a hydrostatic head rating of 1000 mm or less is best regarded as shower resistant, with 1500 mm being usually suitable for summer camping. Tents for year-round use generally have at least 2000 mm; expedition tents intended for extreme conditions are often rated at 3000 mm. Where quoted, groundsheets may be rated for 5000 mm or more. Many tent manufacturers indicate capacity by such phrases as "3 berth" or "2 person". These numbers indicate how many people

5200-525: The psychological aftereffects of witnessing the destruction of war. War also results in lower quality of life and worse health outcomes. A medium-sized conflict with about 2,500 battle deaths reduces civilian life expectancy by one year and increases infant mortality by 10% and malnutrition by 3.3%. Additionally, about 1.8% of the population loses access to drinking water . Most estimates of World War II casualties indicate around 60 million people died, 40 million of whom were civilians. Deaths in

5280-601: The retention of body heat and (to a lesser extent) radiation. Tent fabric may be made of many materials including cotton ( canvas ), nylon , felt and polyester . Cotton absorbs water, so it can become very heavy when wet, but the associated swelling tends to block any minute holes so that wet cotton is more waterproof than dry cotton. Cotton tents were often treated with paraffin to enhance water resistance. Nylon and polyester are much lighter than cotton and do not absorb much water; with suitable coatings they can be very waterproof, but they tend to deteriorate over time due to

5360-419: The rise of the state some 5,000 years ago, military activity has continued over much of the globe. The invention of gunpowder , and its eventual use in warfare, together with the acceleration of technological advances have fomented major changes to war itself. In Western Europe, since the late 18th century, more than 150 conflicts and about 600 battles have taken place. During the 20th century, war resulted in

5440-407: The sacred object to which we are attached, namely our early mother and our fusion with her. For the adult, nations are the sacred objects that generate warfare. Fornari focused upon sacrifice as the essence of war: the astonishing willingness of human beings to die for their country, to give over their bodies to their nation. Despite Fornari's theory that man's altruistic desire for self-sacrifice for

5520-674: The same way in any country. Several theories concern the evolutionary origins of warfare. There are two main schools: One sees organized warfare as emerging in or after the Mesolithic as a result of complex social organization and greater population density and competition over resources; the other sees human warfare as a more ancient practice derived from common animal tendencies, such as territoriality and sexual competition. The latter school argues that since warlike behavior patterns are found in many primate species such as chimpanzees , as well as in many ant species, group conflict may be

5600-454: The sheet to ensure that there is enough air flow to stop condensation . A basha is a simple tent , made from one or two sheets of waterproof fabric and some strong cord . Generally a basha is made of reinforced nylon with eyelets and loops or tabs located along all four sides of the sheet and sometimes across the two central lines of symmetry . The basha is an extremely versatile shelter that can be erected in many different ways to suit

5680-469: The start of the Russian Revolution of 1917 . World War II was the most financially costly conflict in history; its belligerents cumulatively spent about a trillion U.S. dollars on the war effort (as adjusted to 1940 prices). The Great Depression of the 1930s ended as nations increased their production of war materials. By the end of the war, 70% of European industrial infrastructure

5760-495: The tents listed here had a canvas fabric and most used a substantial number of guy ropes (8 to 18). The guys had to be positioned and tensioned fairly precisely in order to pitch the tent correctly, so some training and experience were needed. Pup tents might use wooden or metal poles, but all the other styles mentioned here used wooden poles. These larger tents are seldom used for sleeping. Tent design has influenced many large modern buildings. These buildings have in turn influenced

5840-514: The territory of Alsace-Lorraine has been traded between France and Germany on three different occasions. Typically, war becomes intertwined with the economy and many wars are partially or entirely based on economic reasons. The common view among economic historians is that the Great Depression ended with the advent of World War II . Many economists believe that government spending on the war caused or at least accelerated recovery from

5920-410: The use of a manual pump to inflate the airbeam to the desired level. Airbeams have the unique quality of bending, rather than breaking, when overloaded. Tents that use inflatable airbeams are structured almost identically to those that use flexible poles. Most of these tent styles are no longer generally available. Most of these are single-skin designs, with optional fly sheets for the ridge tents. All

6000-486: The use of one- or two-person tents but may also be without tents or full cover. In modern mountaineering the nature of the bivouac shelter will depend on the level of preparedness, in particular whether existing camping and outdoor gear may be incorporated into the shelter. The word bivouac is French and ultimately derives from an 18th-century Swiss German usage of Beiwacht ( bei by, Wacht watch or patrol). It referred to an additional watch that would be maintained by

6080-405: The way down to the user's face, leaving only a small hole to breathe or look through. Other bivouac sacks have a mesh screen at the face area to allow for outside visibility and airflow, while still protecting from insects. Fully zipping up a bivouac sack is poor practice, both from the obvious risk of hypoxia and the dramatically increased levels of condensation that will form inside the bag. In

6160-542: The world, such as Native Americans , Mongolian, Turkic and Tibetan Nomads, and the Bedouin . Armies all over the world have long used tents as part of their working life. Tents are preferred by the military for their relatively quick setup and take down times, compared to more traditional shelters. One of the world's largest users of tents is the U.S. Department of Defense . The U.S. DoD has strict rules on tent quality and tent specifications. The most common tent uses for

6240-588: Was destroyed. Property damage in the Soviet Union inflicted by the Axis invasion was estimated at a value of 679 billion rubles. The combined damage consisted of complete or partial destruction of 1,710 cities and towns, 70,000 villages/hamlets, 2,508 church buildings, 31,850 industrial establishments, 40,000 mi (64,374 km) of railroad, 4100 railroad stations, 40,000 hospitals, 84,000 schools, and 43,000 public libraries. There are many theories about

6320-667: Was important to have a reputation for retaliation, causing humans to develop instincts for revenge as well as for protecting a group's (or an individual's) reputation (" honor "). Crofoot and Wrangham have argued that warfare, if defined as group interactions in which "coalitions attempt to aggressively dominate or kill members of other groups", is a characteristic of most human societies. Those in which it has been lacking "tend to be societies that were politically dominated by their neighbors". Ashley Montagu strongly denied universalistic instinctual arguments, arguing that social factors and childhood socialization are important in determining

6400-533: Was the result of capitalist countries needing new markets . Expansion of the means of production is only possible if there is a corresponding growth in consumer demand . Since the workers in a capitalist economy would be unable to fill the demand, producers must expand into non-capitalist markets to find consumers for their goods, hence driving imperialism. Demographic theories can be grouped into two classes, Malthusian and youth bulge theories: Malthusian theories see expanding population and scarce resources as

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