Antietam (American Civil War).
Fought September 17, 1862, between the main Confederate army under General Lee, and the Federals under General M’Clellan. On the morning of the 17th Lee had only 35,000 men on the ground against M’Clellan's 95,000. The Federals strongly attacked Lee's left, and after a stubborn fight drove it back, but reinforcements arriving, Lee resumed the offensive, and recovered his lost positions. On the following day neither side was disposed to resume the struggle, and the battle was therefore indecisive. The Federals lost 12,460 men; the Confederates about 9,000.