|Medal of Honors for the three military branches honored|
There are three versions of the Medal of Honor - one for each of the Navy and Coast Guard, Army, and Marines. The designs have changed through the years. Since its beginning in 1861, there have been over 3,500 given to military heroes, and not quite half of these came from the Civil War. In fact, William Johnston is thought to be the youngest to ever receive the award. He was 13 but had been 11 when he earned it as a drummer boy. Mary Edwards Walker also received hers for Civil War bravery.