Conversation so far:
What happened in western Virginia to William McKinley during the Civil War?
McKinley and the 23rd Ohio, led by Colonel Eliakim P. Scammon, set out for western Virginia in July 1861 as a part of the Kanawha Division.
Who were William McKinley's enemy in conflicts in western Virginia?
The Army of Northern Virginia was the enemy of Union forces.
Did The Union win the Second Battle of Bull Run?
The Union lost the Second Battle of Bull Run to the Confederacy.
What happened in Antietam to William McKinley?
The 23rd was in the thick of the fighting at Antietam, and McKinley himself came under heavy fire when bringing rations to the men on the line.
Are there any other interesting aspects about this article on William McKinley besides his service in the American Civil War?
His legacy was suddenly cut short when he was shot on September 6, 1901 by Leon Czolgosz, a second-generation Polish-American with anarchist leanings.

Question: did they lose the battle at antietam?
Self-contained rewrite: Did the Union lose the Battle of Antietam?