Abraham Lincoln: Gettysburg Address http://www.biography.com/people/abraham-lincoln-9382540 Fort Sumter On April 12, 1861, General P.G.T. Beauregard, in command of the Confederate forces around Charleston Harbor, opened fire on the Union garrison holding Fort Sumter. At 2:30pm on April 13 Major Robert Anderson, garrison commander, surrendered the fort and was evacuated the next day. Battle of Gettysburg - American Civil War - HISTORY.com The Battle of Gettysburg, fought from July 1 to July 3, 1863, is considered the most important engagement of the American Civil War. After a great victory over Union forces at Chancellorsville, General Robert E. Lee marched his Army of Northern Virginia into Pennsylvania in late June 1863. The Gettysburg Address - American Civil War - HISTORY.com In November 1863, President Abraham Lincoln was invited to deliver remarks, which later became known as the Gettysburg Address, at the official dedication ceremony for the National Cemetery of Gettysburg in Pennsylvania, on the site of one of the bloodiest and most decisive battles of the Civil War.