July 1, 1863: The Battle of Gettysburg begins
Meade took command of the Army of the Potomac as Lee’s army moved into Pennsylvania. On the morning of July 1, advance units of the forces came into contact with one another just outside of Gettysburg. The sound of battle attracted other units, and by noon the conflict was raging. During the first hours of battle, Union General John Reynolds was killed, and the Yankees found that they were outnumbered. The battle lines ran around the northwestern rim of Gettysburg. The Confederates applied pressure all along the Union front, and they slowly drove the Yankees through the town.
By evening, the Federal troops rallied on high ground on the southeastern edge of Gettysburg. As more troops arrived, Meade’s army formed a three-mile long, fishhook-shaped line running from Culp’s Hill on the right flank, along Cemetery Hill and Cemetery Ridge, to the base of Little Round Top. The Confederates held Gettysburg, and stretched along a six-mile arc around the Union position. Lee’s forces would continue to batter each end of the Union position, before launching the infamous Pickett’s Charge against the Union center on July 3.
H/T History.com