Thomas Ward Custer was a United States Army officer and two-time recipient of the Medal of Honor for bravery during the American Civil War. A younger brother of George Armstrong Custer, he served as his aide at the Battle of Little Bighorn against the Lakota and Cheyenne in the Montana Territory. The two of them, along with their younger brother, Boston Custer, were killed in the overwhelming defeat of United States forces.

The Medal of Honor (MOH) is the United States Armed Forces' highest military decoration and is awarded to recognize American soldiers, sailors, marines, airmen, guardians, and coast guardsmen who have distinguished themselves by acts of valor. The medal is normally awarded by the President of the United States and is presented "in the name of the United States Congress." It is often, not strictly correctly, referred to as the Congressional Medal of Honor.