Francis Asbury Wallar was a Union Army volunteer in the American Civil War and received the Medal of Honor for actions on the first day of the Battle of Gettysburg, July 1, 1863. He was a corporal in Company I of the 6th Wisconsin Infantry Regiment, in the Iron Brigade of the Army of the Potomac. During the battle, he engaged a Confederate soldier of the 2nd Mississippi Infantry Regiment in single combat, capturing him and seizing his battle flag.