Ẹ parí gbólóhùn tó wà nísàlẹ̀ yìí: Ẹgbẹ́ ọmọ ogun ọ̀kọ̀ ojú ogun 121st Field Artillery Battalion, gẹ́gẹ́ bí a ṣe pè é ní February 1, 1942, ṣe iyì fún ara rẹ̀ ní Pacific Theatre of Operations. Àwọn ọlá rẹ̀ ni: Aitape,
Biak, Leyte, Luzon ati New Guinea (pẹlu Saidor Arrowhead). Ni ibẹrẹ 1943 awọn 121st Field Artillery Battalion ni a fun ni awọn howitzers 75 mm dipo awọn howitzers 155 mm ti o jẹ awọn ohun ija rẹ deede bi batalionu atilẹyin gbogbogbo ti Division Artillery.