. "20th Infantry Regiment (United States)" . . . "21st Infantry" . . . . . . . "Tant Que Je Puis (To The Limit of Our Ability)" . . "1st Battalion, 20th Infantry Regiment" . . . . . "20th U.S. Infantry" . . . . . "20th Infantry" . . . . . . . . . . . . . . . . . . "1st Battalion, 20th Infantry" . . "20th U.S. Infantry Regiment" . . . . "20th U. S. Infantry" . . . . . "1862" . . . . . . "20th" . . . . . "20th Regiment" . "20th Infantry Regiment (United States)" . . . . . . "2d Battalion, 20th Infantry Regiment" . . "175px" . . . . . . . . . "1862" . . . . "20th Infantry Regiment" . . "Twentieth Infantry" . . . . .