Today in history 7-3

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1863
July 3
Battle of Gettysburg ends

July 3, 1863: On the third day of the Battle of Gettysburg, Confederate General Robert E. Lee's last attempt at breaking the Union line ends in disastrous failure, bringing the most decisive battle of the American Civil War to an end.

In June 1863, following his masterful victory at the Battle of Chancellorsville, General Lee launched his second invasion of the Union in less than a year. He led his 75,000-man Army of Northern Virginia across the Potomac River, through Maryland, and into Pennsylvania, seeking to win a major battle on Northern soil that would further dispirit the Union war effort and induce Britain or France to intervene on the Confederacy's behalf. The 90,000-strong Army of the Potomac pursued the Confederates into Maryland, but its commander, General Joseph Hooker, was still stinging from his defeat at Chancellorsville and seemed reluctant to chase Lee further. Meanwhile, the Confederates divided their forces and investigated various targets, such as Harrisburg, the Pennsylvania capital.

On June 28, President Abraham Lincoln replaced Hooker with General George Meade, and Lee learned of the presence of the Army of the Potomac in Maryland. Lee ordered his army to concentrate in the vicinity of the crossroads town of Gettysburg and prepare to meet the Federal army. At the same time, Meade sent ahead part of his force into Pennsylvania but intended to make a stand at Pipe Creek in Maryland.

On July 1, a Confederate division under General Henry Heth marched into Gettysburg hoping to seize supplies but finding instead three brigades of Union cavalry. Thus began the Battle of Gettysburg, and Lee and Meade ordered their massive armies to converge on the impromptu battle site. The Union cavalrymen defiantly held the field against overwhelming numbers until the arrival of Federal reinforcements. Later, the Confederates were reinforced, and by mid-afternoon some 19,000 Federals faced 24,000 Confederates. Lee arrived to the battlefield soon afterward and ordered a general advance that forced the Union line back to Cemetery Hill, just south of the town.

During the night, the rest of Meade's force arrived, and by the morning Union General Winfield Hancock had formed a strong Union line. On July 2, against the Union left, General James Longstreet led the main Confederate attack, but it was not carried out until about 4 p.m., and the Federals had time to consolidate their positions. Thus began some of the heaviest fighting of the battle, and Union forces retained control of their strategic positions at heavy cost. After three hours, the battle ended, and the total number of dead at Gettysburg stood in the thousands.