U. S. Civil War History, July 2013: 150th Anniversary of the Battle of Gettysburg: July 1st to 3rd, 1863

• The Battle of Gettysburg: Summary & Facts
• AmericanCivilWar.Com: American Civil War Battle, Gettysburg, Pennsylvania, July 1-3 1863

"In July of 1863, General Robert E. Lee's Army of Northern Virginia of 75,000 men and the 97,000 man Union Army of the Potomac, under George G. Meade, concentrated together at Gettysburg and fought the Battle of Gettysburg.
Of the more than 2,000 land engagements of the Civil War, Gettysburg ranks supreme. Although the Battle of Gettysburg did not end the war, it was the great battle of the war, marking the point when the ultimate victory of the North over the South became clear to both sides alike.

Here at Gettysburg, on July 1, 2, and 3, 1863, more men fought and died than in any other battle in American history."

Source: AmericanCivilWar.Com