The bloodiest battle in U.S. history occurred in neither the Civil War nor World War II. It was the Battle of Meuse-Argonne in 1918 which ended World War I and saw the loss of 26,277 American lives with another 95,786 wounded. The second worst battle was the Battle of the Bulge in World War II which saw 19,276 deaths. There were 7,863 deaths at Gettysburg, the worst Civil War battle.
Remember all veterans today.