Updated:
Original:
Year
1862

Battle of Antietam breaks out

Beginning early on the morning of this day in 1862, Confederate and Union troops in the Civil War clash near Maryland’s Antietam Creek in the bloodiest single day in American military history.

The Battle of Antietam marked the culmination of Confederate General Robert E. Lee’s first invasion of the Northern states. Guiding his Army of Northern Virginia across the Potomac River in early September 1862, the great general daringly divided his men, sending half of them, under the command of General Thomas “Stonewall” Jackson, to capture the Union garrison at Harper’s Ferry.

President Abraham Lincoln put Major General George B. McClellan in charge of the Union troops responsible for defending Washington, D.C., against Lee’s invasion. Over the course of September 15 and 16, the Confederate and Union armies gathered on opposite sides of Antietam Creek.

Fighting began in the foggy dawn hours of September 17. As savage and bloody combat continued for eight hours across the region, the Confederates were pushed back but not beaten, despite sustaining some 15,000 casualties.

By the time the sun went down, both armies still held their ground, despite staggering combined casualties–nearly 23,000 of the 100,000 soldiers engaged, including more than 3,600 dead. McClellan’s center never moved forward, leaving a large number of Union troops that did not participate in the battle.

On the morning of September 18, both sides gathered their wounded and buried their dead. That night, Lee turned his forces back to Virginia.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us!

ALSO ON THIS DAY

U.S. Constitution signed

The Constitution of the United States of America is signed by 38 of 41 delegates present at the conclusion of the Constitutional Convention in Philadelphia. Supporters of the document waged a hard-won battle to win ratification by the necessary nine out of 13 U.S. states. The ...read more

Space Shuttle unveiled

On September 17, 1976, NASA publicly unveils its first space shuttle, the Enterprise, during a ceremony in Palmdale, California. Development of the aircraft-like spacecraft cost almost $10 billion and took nearly a decade. In 1977, the Enterprise became the first space shuttle to ...read more

Camp David Accords signed

At the White House in Washington, D.C., Egyptian President Anwar el-Sadat and Israeli Prime Minister Menachem Begin sign the Camp David Accords, laying the groundwork for a permanent peace agreement between Egypt and Israel after three decades of hostilities. The accords were ...read more

Soviet Union invades Poland

On this day in 1939, Soviet Foreign Minister Vyacheslav Molotov declares that the Polish government has ceased to exist, as the U.S.S.R. exercises the “fine print” of the Hitler-Stalin Non-aggression pact—the invasion and occupation of eastern Poland. Hitler’s troops were already ...read more