There are just over one million soldiers currently serving in the U.S. Army. About half of that number is active-duty Soldiers who serve full-time, while the. Military Trivia Facts · 1. Thirty of the 45 presidents served in the Army, 24 during time of war, two earned the rank of five-star general (Washington -- who was. 30 Crazy Facts about the U.S. Army ; 1. The Army Is Older Than the Country ; 2. The Army Pioneered Modern Guerrilla Warfare ; 3. George Washington Chose the Army's.