. "20th Artillery" . "thumb|20th FA" . "20th Aerial Rocket Artillery" . . . "20th Arty" . . "20th Aerial Field Artillery Regiment" . "20th Field Artillery Regiment (United States)" . . . . . "20th Artillery Regiment" . . . . "20th Field Artillery Battalion" . . . "1916" . . "\\\"Duty Not Reward\\\"" . "20th Field Artillery" . "1916" . . . "20th FA" . . . . . . "20th Field Artillery Regiment" . . . "2nd Battalion, 20th Field Artillery Regiment" . . "20th Field Artillery Regiment (United States)" . . . . . . "2nd Battalion, 20th Aerial Rocket Artillery Regiment" .