Misplaced Pages

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72-398: Cemetery Hill overlooks the main downtown area of Gettysburg from the south, at 503 feet (153 m) above sea level , 80 feet (24 m) above the town center, about 100 feet (30 m) above Winebrenner's Run at its base. Its crest extends in a southwest–northeast direction for about 700 yards (640 m). A shallow saddle on the crest about 150 yards (140 m) from its northeast slope

144-453: A "favorable opportunity presented." When Ewell informed Lane that his attack was starting and requested cooperation, Lane sent back no reply. Losses on both sides were severe; among the casualties was Col. Avery, who was struck in the neck by a musket ball, felling him from his horse, where he was discovered after the charge by several of his soldiers and Major Tate of the 6th North Carolina. Unable to speak from his mortal wound, Avery scribbled

216-409: A defined barometric pressure . Generally, the pressure used to set the altimeter is the barometric pressure that would exist at MSL in the region being flown over. This pressure is referred to as either QNH or "altimeter" and is transmitted to the pilot by radio from air traffic control (ATC) or an automatic terminal information service (ATIS). Since the terrain elevation is also referenced to MSL,

288-432: A few metres, in timeframes ranging from minutes to months: Between 1901 and 2018, the average sea level rose by 15–25 cm (6–10 in), with an increase of 2.3 mm (0.091 in) per year since the 1970s. This was faster than the sea level had ever risen over at least the past 3,000 years. The rate accelerated to 4.62 mm (0.182 in)/yr for the decade 2013–2022. Climate change due to human activities

360-408: A line parallel to Winebrenner's Run, a narrow tributary of Rock Creek to the southeast of town. Hays commanded five Louisiana regiments, which together numbered only about 1,200 officers and men. Avery had three North Carolina regiments totaling 900. The brigade of Brig. Gen. John B. Gordon was in support behind Hays and Avery but did not participate in the fighting. Defending East Cemetery Hill were

432-504: A move that is still controversial, Ewell did not take advantage of Johnson's division and attack Cemetery Hill immediately that evening, when it might have been decisive. Johnson controversially declined to attack Culp's Hill that evening, for which he had a discretionary order. Instead, Johnson's division was the primary force that attacked Culp's Hill on the second and third days, suffering considerable casualties assaulting this impregnable position multiple times with no lasting success. In

504-479: A night assault against two lines of Union troops behind stone walls, backed up by significant artillery. Rodes's after-battle report also expressed concern about a lack of cooperation from the adjoining division on A.P. Hill's left flank. Maj. Gen. William Dorsey Pender had been wounded by a shell that afternoon and Brig. Gen. James H. Lane was in command of Pender's division. Ewell sent a staff officer to speak with Lane, who explained that his orders were to attack if

576-438: A reference datum for mean sea level (MSL). It is also used in aviation, where some heights are recorded and reported with respect to mean sea level (contrast with flight level ), and in the atmospheric sciences , and in land surveying . An alternative is to base height measurements on a reference ellipsoid approximating the entire Earth, which is what systems such as GPS do. In aviation, the reference ellipsoid known as WGS84

648-470: A sharp reduction in greenhouse gas emissions, this may increase to hundreds of millions in the latter decades of the century. Local factors like tidal range or land subsidence will greatly affect the severity of impacts. For instance, sea level rise in the United States is likely to be two to three times greater than the global average by the end of the century. Yet, of the 20 countries with

720-499: A simple note for Tate: "Major, tell my father I died with my face to the enemy. I. E. Avery." He died the following day. On July 3, there was no infantry attack on Cemetery Hill; the primary Confederate attacks were on Culp's Hill and on the lower portion of Cemetery Ridge. Union cannons on Cemetery Hill counter fired on the Confederate artillery barrage that preceded Pickett's Charge and provided antipersonnel support fire during

792-517: A surprise attack of Union forces who were based on Cheat Mountain, some distance northwards. This force was commanded by union general Robert Milroy , who would become Johnson's nemesis. (This brigade-sized force was given the grandiose name "Army of the Northwest".) In the winter of 1861–62, Johnson's army cooperated with Maj. Gen. Thomas J. "Stonewall" Jackson in the early stages of Jackson's Valley Campaign . While Jackson marched his army into

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864-405: Is a type of vertical datum  – a standardised geodetic datum  – that is used, for example, as a chart datum in cartography and marine navigation , or, in aviation, as the standard sea level at which atmospheric pressure is measured to calibrate altitude and, consequently, aircraft flight levels . A common and relatively straightforward mean sea-level standard

936-488: Is because the sea is in constant motion, affected by the tides, wind , atmospheric pressure, local gravitational differences, temperature, salinity , and so forth. The mean sea level at a particular location may be calculated over an extended time period and used as a datum . For example, hourly measurements may be averaged over a full Metonic 19-year lunar cycle to determine the mean sea level at an official tide gauge . Still-water level or still-water sea level (SWL)

1008-427: Is due to change in either the volume of water in the world's oceans or the volume of the oceanic basins . Two major mechanisms are currently causing eustatic sea level rise. First, shrinking land ice, such as mountain glaciers and polar ice sheets, is releasing water into the oceans. Second, as ocean temperatures rise, the warmer water expands. Many factors can produce short-term changes in sea level, typically within

1080-483: Is increasingly used to define heights; however, differences up to 100 metres (328 feet) exist between this ellipsoid height and local mean sea level. Another alternative is to use a geoid -based vertical datum such as NAVD88 and the global EGM96 (part of WGS84). Details vary in different countries. When referring to geographic features such as mountains, on a topographic map variations in elevation are shown by contour lines . A mountain's highest point or summit

1152-408: Is instead a long-term average of tide gauge readings at a particular reference location. Sea levels can be affected by many factors and are known to have varied greatly over geological time scales . Current sea level rise is mainly caused by human-induced climate change . When temperatures rise, mountain glaciers and polar ice sheets melt, increasing the amount of water in the oceans, while

1224-450: Is the level of the sea with motions such as wind waves averaged out. Then MSL implies the SWL further averaged over a period of time such that changes due to, e.g., the tides , also have zero mean. Global MSL refers to a spatial average over the entire ocean area, typically using large sets of tide gauges and/or satellite measurements. One often measures the values of MSL with respect to

1296-727: Is the main cause. Between 1993 and 2018, melting ice sheets and glaciers accounted for 44% of sea level rise , with another 42% resulting from thermal expansion of water . Sea level rise lags behind changes in the Earth 's temperature by many decades, and sea level rise will therefore continue to accelerate between now and 2050 in response to warming that has already happened. What happens after that depends on human greenhouse gas emissions . If there are very deep cuts in emissions, sea level rise would slow between 2050 and 2100. It could then reach by 2100 slightly over 30 cm (1 ft) from now and approximately 60 cm (2 ft) from

1368-723: Is the point where the Baltimore Pike crosses the hill and separates East Cemetery Hill from the remainder. The slopes to the north and west rise gradually; on East Cemetery Hill, the rise is steeper. The hill is crossed by the Baltimore Pike and the Emmitsburg Road, with the Taneytown Road between them. The 1858 south boundary for the Gettysburg borough extended southeast from the Emmitsburg Road to

1440-531: Is typically illustrated with the AMSL height in metres, feet or both. In unusual cases where a land location is below sea level, such as Death Valley, California , the elevation AMSL is negative. It is often necessary to compare the local height of the mean sea surface with a "level" reference surface, or geodetic datum, called the geoid . In the absence of external forces, the local mean sea level would coincide with this geoid surface, being an equipotential surface of

1512-646: The 6th U.S. Infantry and was promoted to first lieutenant in less than a year. He served in the Seminole Wars in Florida and then in the West. In the Mexican–American War , Johnson distinguished himself for action at Veracruz , Cerro Gordo , Churubusco , Molino del Rey , and Chapultepec . He received two brevet promotions, to captain and major , during the war and was awarded a ceremonial sword by

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1584-510: The Battle of Greenbrier River . He was promoted to brigadier general on December 13, 1861. He was ordered to defend Allegheny mountain, where a route from Cheat Mountain passed southwards then east over the mountain and to Shenandoah valley. His position was strong but still overextended. He was eventually ordered to retreat to a better position on Valley Mountain, but before making the move his forces (six regiments) were struck on their position by

1656-462: The Battle of McDowell , Johnson was severely wounded with a bullet to the ankle, which took a long time to heal. He returned to Richmond for his convalescence and remained there for nearly a year, active in the social scene. Although Johnson was a heavy-set, rough-looking, rude character who was still a bachelor at age 47, he had the reputation of a ladies' man. Due to a wound he received in Mexico, he

1728-665: The Franklin-Nashville Campaign , Johnson was captured again at the Battle of Nashville on December 16, 1864. He again spent months in a Union prisoner of war camp at Johnson's Island , in Lake Erie . At the end of the war, Johnson was moved to the Old Capitol Prison in Washington, D.C., where he was accused of being somehow complicit in the assassination of Abraham Lincoln . Nothing came of

1800-494: The I Corps , commanded the artillery batteries on the hill and on Stevens Knoll. The relatively steep slope of East Cemetery Hill made artillery fire difficult to direct against infantry because the gun barrels could not be depressed sufficiently, but they did their best with canister and double canister fire. The Confederate attack began with a Rebel yell against the Ohio regiments at the stone wall. Just beforehand, Ames had sent

1872-622: The geoid of the Earth, which approximates the local mean sea level for locations in the open ocean. The geoid includes a significant depression in the Indian Ocean , whose surface dips as much as 106 m (348 ft) below the global mean sea level (excluding minor effects such as tides and currents). Precise determination of a "mean sea level" is difficult because of the many factors that affect sea level. Instantaneous sea level varies substantially on several scales of time and space. This

1944-418: The height above mean sea level (AMSL). The term APSL means above present sea level, comparing sea levels in the past with the level today. Earth's radius at sea level is 6,378.137 km (3,963.191 mi) at the equator. It is 6,356.752 km (3,949.903 mi) at the poles and 6,371.001 km (3,958.756 mi) on average. This flattened spheroid , combined with local gravity anomalies , defines

2016-606: The "Stonewall Division" in Lt. Gen. Richard S. Ewell 's Second Corps. Robert E. Lee had become dissatisfied with the previous commander at the battle and summoned Johnson back from medical leave to take the command. By May 1863, Johnson had recovered enough to lead his division in the Gettysburg Campaign . He still needed a heavy hickory stick to move around on foot (and was known to use it against men he believed were shirking battle) and his men nicknamed him "Old Clubby". On

2088-562: The 1690s. Satellite altimeters have been making precise measurements of sea level since the launch of TOPEX/Poseidon in 1992. A joint mission of NASA and CNES , TOPEX/Poseidon was followed by Jason-1 in 2001 and the Ocean Surface Topography Mission on the Jason-2 satellite in 2008. Height above mean sea level ( AMSL ) is the elevation (on the ground) or altitude (in the air) of an object, relative to

2160-472: The 17th Connecticut from its place on the left of the line to a position in the center. This left a gap, which Hays's Louisianans exploited, and they bounded over the stone wall. Other troops exploited other weak spots in the line, and soon some of the Confederates had reached the batteries at the top of the hill, while others fought in the darkness with the four remaining Union regiments on the line behind

2232-973: The 19th century. With high emissions it would instead accelerate further, and could rise by 1.0 m ( 3 + 1 ⁄ 3  ft) or even 1.6 m ( 5 + 1 ⁄ 3  ft) by 2100. In the long run, sea level rise would amount to 2–3 m (7–10 ft) over the next 2000 years if warming stays to its current 1.5 °C (2.7 °F) over the pre-industrial past. It would be 19–22 metres (62–72 ft) if warming peaks at 5 °C (9.0 °F). Rising seas affect every coastal and island population on Earth. This can be through flooding, higher storm surges , king tides , and tsunamis . There are many knock-on effects. They lead to loss of coastal ecosystems like mangroves . Crop yields may reduce because of increasing salt levels in irrigation water. Damage to ports disrupts sea trade. The sea level rise projected by 2050 will expose places currently inhabited by tens of millions of people to annual flooding. Without

Cemetery Hill - Misplaced Pages Continue

2304-533: The Cemetery Hill summit on the Taneytown Rd, then northeast across the Baltimore Pike summit to the hill's base, then northward to Winebrenner Run . On the south slope of Cemetery Hill (originally named Raffensperger's Hill, after farmer Peter Raffensperger, who owned over 6 acres (24,000 m) on the eastern slope) is the 1854 Evergreen Cemetery and its 1855 gatehouse used as a headquarters during

2376-474: The Confederate "Mule Shoe" defensive line, Johnson was captured along with Brig. Gen. George H. Steuart , and most of Johnson's division. He was imprisoned for months at Morris Island , off the coast of Charleston, South Carolina , and was exchanged on August 3, 1864. He was sent west to join Lt. Gen. John Bell Hood 's Army of Tennessee , where he commanded a division in the corps of Lt. Gen. Stephen D. Lee . During

2448-471: The Confederate infantry attack. National Park Service historian Troy Harman has written that Robert E. Lee 's ultimate objective for the assaults by Longstreet on July 2 and July 3 was actually Cemetery Hill, rolling the Union left flank up Cemetery Ridge. Post-battle, East Cemetery Hill was occupied for several weeks by state militiamen, who established a tented camp site to maintain a military presence, secure

2520-454: The Confederates attacked suddenly and violently and entered the battery's position but insist that they were there only briefly." The collapse of "Cemetery Hill, the keystone of the Union line," "would have certainly required Meade to at least abandon his position" at Gettysburg, but the following day, artillery anchored here aided the repulse of the famous attack by Pickett, Pettigrew, Trimble, Wilcox & Lang. Generals Howard and Schurz heard

2592-448: The Earth's gravitational field which, in itself, does not conform to a simple sphere or ellipsoid and exhibits gravity anomalies such as those measured by NASA's GRACE satellites . In reality, the geoid surface is not directly observed, even as a long-term average, due to ocean currents, air pressure variations, temperature and salinity variations, etc. The location-dependent but time-persistent separation between local mean sea level and

2664-705: The Marégraphe in Marseilles measures continuously the sea level since 1883 and offers the longest collated data about the sea level. It is used for a part of continental Europe and the main part of Africa as the official sea level. Spain uses the reference to measure heights below or above sea level at Alicante , while the European Vertical Reference System is calibrated to the Amsterdam Peil elevation, which dates back to

2736-640: The Potomac . On July 1, 1863, Maj. Gen. Oliver O. Howard left infantry and artillery to hold the hill in case the army needed to fall back from its positions north and west of Gettysburg. Cemetery Hill became the rallying point for retreating Union troops of the I Corps and XI Corps (from fighting north and northwest of town). One of the great controversies of the battle was the failure of Lt. Gen. Richard S. Ewell , and his subordinate, Brig. Gen. William "Extra Billy" Smith , to attack and capture Cemetery Hill. Smith thought Union troops were approaching from

2808-455: The Union gunners had a decided advantage. Ewell's four batteries were forced to withdraw with heavy losses, and his best artillerist, 19-year-old Joseph W. Latimer , the "Boy Major", was mortally wounded. Around 7 p.m., as the Confederate assaults on the Union left and center were petering out, Ewell chose to begin his main infantry assault. He sent three brigades from the division of Maj. Gen. Edward "Allegheny" Johnson across Rock Creek and up

2880-546: The Union left ( Little Round Top , Devil's Den , Wheatfield ). Lt. Gen. Richard S. Ewell and the Second Corps were assigned the mission of launching a simultaneous demonstration against the Union right, a minor attack that was intended to distract and pin down the Union defenders against Longstreet. Ewell was to exploit any success his demonstration might achieve by following up with a full-scale attack at his discretion. Ewell began his demonstration at 4 p.m. upon hearing

2952-559: The base of the hill. (Brickyard Lane was also known at the time as Winebrenner's Lane and today is named Wainwright Avenue.) Von Gilsa's brigade was scattered along the lane as well as on the hill. Two regiments, the 41st New York and the 33rd Massachusetts, were stationed in Culp's Meadow beyond Brickyard Lane in expectation of an attack by Johnson's division. More westerly on the hill were the divisions of Maj. Gens. Adolph von Steinwehr and Carl Schurz . Col. Charles S. Wainwright , nominally of

Cemetery Hill - Misplaced Pages Continue

3024-511: The battle. On June 26, 1863, prior to the Battle of Gettysburg, Lt. Col. Elijah V. White 's Confederate cavalry occupied the hill and captured several horses hidden by local citizens, then departed to York County, Pennsylvania . The Gettysburg Railroad Station telegraph was subsequently moved to Cemetery Hill. The hill remained essentially free of military forces until the arrival of the Army of

3096-528: The battlefield from looters and curiosity seekers, collect remaining military weapons, and provide manpower and services for the area's hospitals. Elizabeth C. Thorn (pregnant wife of the keeper of Evergreen Cemetery who was at war), her parents, and hired hands dug 105 graves for soldiers killed at or near Cemetery Hill. The Gettysburg National Cemetery was established in 1863 north of the Evergreen Cemetery . Abraham Lincoln 's Gettysburg Address

3168-455: The commotion and rushed the 58th and 119th New York of Col. Włodzimierz Krzyżanowski 's brigade from West Cemetery Hill to the aid of Wiedrich's battery. Howard's lines were getting thin, so he sent for help to Maj. Gen. Winfield S. Hancock of the II Corps . Hancock ordered one of his brigades under Col. Samuel S. Carroll to rush from Cemetery Ridge and assist the defenders. They arrived at

3240-434: The division of Maj. Gen. Jubal A. Early against East Cemetery Hill from the east, and he alerted the division of Maj. Gen. Robert E. Rodes to prepare a follow-up assault against Cemetery Hill proper from the northwest. The two brigades from Early's division were commanded by Brig. Gen. Harry T. Hays : his own Louisiana Tigers Brigade and Hoke's Brigade, the latter commanded by Col. Isaac E. Avery . They stepped off from

3312-614: The double-quick, charging through the dark from the cemetery, just as the Confederate attack was starting to ebb. Carroll's men secured Ricketts's battery and swept the North Carolinians down the hill. Over at Wiedrich's battery, Krzyżanowski led his men to sweep the Louisiana attackers down the hill until they reached the base and "flopped down" for Wiedrich's guns to fire canister at the retreating Confederates. Defending East Cemetery Hill would have been much more difficult had

3384-410: The east, which caused Early to delay his attack on the hill to defend against the supposed threat. There proved to be no significant Union troop movements from the east, and Smith was the only brigadier general not commended by Early after the battle. On July 2, Confederate General Robert E. Lee ordered attacks on both ends of the Union line. Lt. Gen. James Longstreet attacked with his First Corps on

3456-511: The eastern slope of Culp's Hill against a line of breastworks manned by the XII Corps brigade of Brig. Gen. George S. Greene . Greene's men held off the Confederate attack for hours, although the attackers were able to establish a foothold in some abandoned Union rifle pits. The fighting on Culp's Hill would resume the following day. Not long after the assault on Culp's Hill began, as dusk fell around 7:30 p.m., Ewell sent two brigades from

3528-415: The existing seawater also expands with heat. Because most of human settlement and infrastructure was built in response to a more-normalized sea level with limited expected change, populations affected by sea level rise will need to invest in climate adaptation to mitigate the worst effects or, when populations are at extreme risk, a process of managed retreat . The term above sea level generally refers to

3600-594: The fall of 1863, Johnson played a prominent role in the Mine Run Campaign . In the Overland Campaign of 1864, Johnson fought well at the Battle of the Wilderness and when Lt. Gen. James Longstreet was seriously wounded there, Robert E. Lee considered Johnson as a replacement corps commander. During the Battle of Spotsylvania Court House , on May 12, 1864, at the "Bloody Angle" section of

3672-482: The geoid is referred to as (mean) ocean surface topography . It varies globally in a typical range of ±1 m (3 ft). Several terms are used to describe the changing relationships between sea level and dry land. The melting of glaciers at the end of ice ages results in isostatic post-glacial rebound , when land rises after the weight of ice is removed. Conversely, older volcanic islands experience relative sea level rise, due to isostatic subsidence from

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3744-634: The greatest exposure to sea level rise, twelve are in Asia , including Indonesia , Bangladesh and the Philippines. The resilience and adaptive capacity of ecosystems and countries also varies, which will result in more or less pronounced impacts. The greatest impact on human populations in the near term will occur in the low-lying Caribbean and Pacific islands . Sea level rise will make many of them uninhabitable later this century. Pilots can estimate height above sea level with an altimeter set to

3816-497: The guns. It was now fully dark. The enemy stood with tenacity never before displayed by them, but with bayonet, clubbed musket, sword, pistol, and rocks from the wall, we cleared the heights and silenced the guns. Harry Pfanz provides an alternative view that contrasts with Tate's: "Although the Confederates wrote and spoke of occupying the crest of the hill and capturing the batteries there, Union accounts concede less Confederate success. The sparse accounts of Wiedrich's battery say that

3888-555: The height of planetary features. Local mean sea level (LMSL) is defined as the height of the sea with respect to a land benchmark, averaged over a period of time long enough that fluctuations caused by waves and tides are smoothed out, typically a year or more. One must adjust perceived changes in LMSL to account for vertical movements of the land, which can occur at rates similar to sea level changes (millimetres per year). Some land movements occur because of isostatic adjustment to

3960-591: The land; hence a change in relative MSL or ( relative sea level ) can result from a real change in sea level, or from a change in the height of the land on which the tide gauge operates, or both. In the UK, the ordnance datum (the 0 metres height on UK maps) is the mean sea level measured at Newlyn in Cornwall between 1915 and 1921. Before 1921, the vertical datum was MSL at the Victoria Dock, Liverpool . Since

4032-481: The melting of ice sheets at the end of the last ice age . The weight of the ice sheet depresses the underlying land, and when the ice melts away the land slowly rebounds . Changes in ground-based ice volume also affect local and regional sea levels by the readjustment of the geoid and true polar wander . Atmospheric pressure , ocean currents and local ocean temperature changes can affect LMSL as well. Eustatic sea level change (global as opposed to local change)

4104-547: The mountains of the present-day Eastern Panhandle of West Virginia to conduct raids on the Baltimore and Ohio Railroad , Johnson was tasked with protecting against a Union invasion of the "upper," more elevated areas of the Shenandoah Valley near Staunton, Virginia . His Army of the Northwest constructed a series of breastworks and trenches atop Shenandoah Mountain which they named simply Fort Edward Johnson . At

4176-411: The once commanding view has been blocked by this sprawl. 39°49′08″N 77°13′49″W  /  39.81889°N 77.23028°W  / 39.81889; -77.23028 Sea level Mean sea level ( MSL , often shortened to sea level ) is an average surface level of one or more among Earth 's coastal bodies of water from which heights such as elevation may be measured. The global MSL

4248-400: The overall attack been better coordinated. To the northwest, Maj. Gen. Robert Rodes 's division was not ready to attack until Early's fight was almost over. It had filed west from the town and into the fields along the dirt path that is now Long Lane, where it stopped after advancing a short distance in the darkness. Brig. Gen. Dodson Ramseur , the leading brigade commander, saw the futility of

4320-480: The pilot can estimate height above ground by subtracting the terrain altitude from the altimeter reading. Aviation charts are divided into boxes and the maximum terrain altitude from MSL in each box is clearly indicated. Once above the transition altitude, the altimeter is set to the international standard atmosphere (ISA) pressure at MSL which is 1013.25 hPa or 29.92 inHg. Edward Johnson (general) Edward "Allegheny" Johnson (April 16, 1816 – March 2, 1873)

4392-561: The second and third days. Ewell and Johnson are blamed by many for the loss of this decisive battle. Johnson was born on Salisbury Plantation near current-day Midlothian in Chesterfield County, Virginia , but his family soon moved to Kentucky . He attended the United States Military Academy and graduated (after five years of study) in 1838. He was commissioned a brevet second lieutenant in

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4464-435: The sound of Longstreet's guns to the south. For three hours, he chose to limit his demonstration to an artillery barrage from Benner's Hill, about a mile (1,600 m) to the northeast. Although the Union defenders on Cemetery Hill received some damage from this fire, they returned counterbattery fire with a vengeance. Cemetery Hill is over 50 feet (15 m) taller than Benner's Hill, and the geometry of artillery science meant that

4536-728: The state of Virginia for his bravery. Johnson returned to duty on the Western frontier, serving in the Dakota Territory , California, Kansas , and on the Utah Expedition . After the outbreak of the Civil War, Johnson resigned his United States Army commission and received the rank of colonel in the 12th Georgia Infantry on July 2, 1861. The 12th Georgia fought in Gen. Robert E. Lee 's first campaign in western Virginia, at

4608-648: The stone wall. On the crest of the hill, the gunners of Captain Michael Wiedrich's New York battery and Captain R. Bruce Ricketts 's Pennsylvania battery engaged in hand-to-hand combat against the invaders. Major Samuel Tate of the 6th North Carolina wrote afterward: 75 North Carolinians of the Sixth Regiment and 12 Louisianians of Hays's brigade scaled the walls and planted the colors of the Sixth North Carolina and Ninth Louisiana on

4680-518: The times of the Russian Empire , in Russia and its other former parts, now independent states, the sea level is measured from the zero level of Kronstadt Sea-Gauge. In Hong Kong, "mPD" is a surveying term meaning "metres above Principal Datum" and refers to height of 0.146 m (5.7 in) above chart datum and 1.304 m (4 ft 3.3 in) below the average sea level. In France,

4752-457: The two brigades (Cols. Andrew L. Harris and Leopold von Gilsa ) of Brig. Gen. Francis C. Barlow 's division (now commanded by Brig. Gen. Adelbert Ames ) of the XI Corps. Both had seen heavy action on July 1 and they consisted of, respectively, 650 and 500 officers and men. Harris's men were stationed at a low stone wall on the northern end of the hill and wrapped around onto Brickyard Lane at

4824-542: The way north into Pennsylvania as part of the left wing (under command of Ewell) that passed across the Shenandoah valley, Johnson's command participated in defeating Union troops fortified at the city of Winchester , commanded by Johnson's old nemesis Maj. Gen. Robert H. Milroy at the Second Battle of Winchester . Johnson arrived at the Battle of Gettysburg on the evening of the first day, July 1, 1863. In

4896-411: The weight of cooling volcanos. The subsidence of land due to the withdrawal of groundwater is another isostatic cause of relative sea level rise. On planets that lack a liquid ocean, planetologists can calculate a "mean altitude" by averaging the heights of all points on the surface. This altitude, sometimes referred to as a "sea level" or zero-level elevation , serves equivalently as a reference for

4968-487: Was a United States Army officer and Confederate general in the American Civil War . Highly rated by Robert E. Lee, he was made a divisional commander under Richard S. Ewell . On the first evening of the Battle of Gettysburg (July 1, 1863), Ewell missed his opportunity to attack Cemetery Hill, and Johnson opted against attacking Culp's Hill, for which he had a discretionary order, though he attempted this on

5040-424: Was afflicted with an eye that winked uncontrollably, causing many women to believe he was flirting with them. He caused enough attention that he rated mentions in the famous diary of Mary Chesnut . In 1863, following the reorganization of the Army of Northern Virginia to compensate for the death of Stonewall Jackson after the Battle of Chancellorsville , Johnson was promoted to major general and given command of

5112-528: Was delivered there during the Consecration of the National Cemetery at Gettysburg . The 1867 National Homestead at Gettysburg operated as an orphanage at the north foot of the hill, and an 1878 wooden observation tower of 40 ft (12 m) East Cemetery Hill had been built near the monument for Battery B, Pennsylvania Light Artillery . The 1893–1917 Gettysburg Electric Railway

5184-485: Was on several sides of the hill, and the 1921–2008 Gettysburg National Museum operated on the west side of Cemetery Hill along the Taneytown Road. The areas on the northern and western slopes of the hill are now largely occupied by tourist-related businesses (hotels, restaurants, gift shops, battlefield tour agencies, private museums, etc.). The military importance of the heights is not as evident today since

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