<prompt> Bhala okuqhubekayo kwalesi sigaba - I-21st Marine Regiment yasungulwa ngoJulayi 14, 1942, eCamp Elliot, eSan Diego, eCalifornia, kodwa empeleni yayihlelwe eNew River, eNorth Carolina. Amalungu amaningi okuqala aleli qembu ayevela e-6th Marine Regiment. Babelwa i-3rd Marine Division, kodwa kusukela ngoJanuwari kuya kuJuni 1943 babeyiqembu elizimele. Ngesikhathi sempi, i-regiment yabamba iqhaza eMpini yaseBougainville, eMpini yaseGuam Fig. 1 naseMpini yase-Iwo Jima. Ngemva kokuzinikela kwamaJapane  <response>: I-21st Marines yathuthela eGuam lapho yavalwa khona ngoDisemba 20, 1945. 