"Thai Battalion" . . . . "Fort Nawaminthrachini" . "1st Infantry Battalion of the 21st Regimental Combat Team" . "21st Infantry Regiment" . "21st Combined Regiment" . "21st infantry regiment" . . "Purple" . . . . . . . . "1st Battalion of the 21st Thai Regiment" . . . . . "21st Infantry Regiment (Queen's Guard)" . "21st Infantry Regiment, Queen Sirikit's Guard" . "1950" . "the 21st Infantry Regiment, Queen's Guard" . . . "21st Infantry Regiment (Thailand)" . "21st Infantry" . "Regiment" . "21st Infantry Regiment (Thailand)" . . . . . "21st Royal Thailand Regimental Combat Team" . "21st Royal Thai Regiment" . "'''21st Infantry Regiment, Queen Sirikit's Guard'''" . . . . "21st Infantry Regiment, Queen's Guard" . "Thai" . .