What was the deadliest battle in American history?

Question is very deceptive. The single day battle record is Antietam at 3654 deaths. Meuse-Argonne was a 46 day long battle! 46 days of Antietam equals 149,814 deaths. Just a vent on my part.

The deadliest battle of a single day was antietam in American history.

Copilot Search Branding The Battle of Gettysburg (July 1–3, 1863) is considered the deadliest battle in American history, with over 7,000 soldiers killed. Overview of Gettysburg The Battle of Gettysburg was a pivotal engagement during the American Civil War, fought over three days in southeastern Pennsylvania. It resulted in 7,863 American deaths, including 3,155 Union soldiers and 4,708 Confederate soldiers. The battle is often cited as the turning point of the Civil War, halting the Confederate advance into the North and inflicting massive casualties on both sides, which contributed to the overall staggering death toll of the war (over 1,000,000 combined for both sides) The National Interest Comparison with Other Deadly Battles Battle of Antietam (September 17, 1862): Known as the bloodiest single day in American history, with 3,675 killed and total casualties (killed, wounded, missing) of 22,717 Wikipedia Battle of Okinawa (April 1 – June 21, 1945): One of the deadliest World War II battles for Americans, with 12,513 U.S. combat fatalities, though it was a prolonged campaign rather than a single engagement The National Interest Battle of Hürtgen Forest (September 19, 1944 – February 10, 1945): Resulted in 8,157 U.S. deaths, highlighting the high toll of extended combat operations The National Interest Factors Contributing to High Casualties The extreme death toll at Gettysburg and other Civil War battles was due to a combination of linear infantry tactics, muskets and artillery, and close-range engagements. In contrast, 20th-century battles like Okinawa involved modern weaponry, prolonged campaigns, and high-intensity combat, which also led to significant fatalities. Significance Gettysburg remains a symbol of the human cost of war in American history. Its scale of casualties, combined with its strategic importance, makes it the deadliest battle fought on American soil. While other battles, particularly in World War II, caused more deaths over longer campaigns, Gettysburg’s concentrated three-day combat makes it historically unparalleled in terms of immediate loss of life History Collection

The deadliest single-day battle in American history is considered to be the Battle of Antietam, which took place on September 17, 1862, during the American Civil War, where nearly 23,000 casualties were reported between Union and Confederate forces combined.

Comparing the deadliness of battles in this question is like comparing kittens to lions with the justification that “they are both CATS!”

Dan Ridgway, For those of us who were there will strongly disagree. While officially considered a "conflict" it WAS a battle. Daily.

Cheryl Heussner Bailey, sorry but actual number was 3654 combined deaths.

Maybe the question should have been the deadliest battle in America

The answer to this question was Antietam where 22654 men died.

Wrong again QC!!! Vietnam.50K + dead.