Mezue ahịrịokwu na-esonụ: M21 jere ozi na Western Front, na-ahụ ihe omume na Normandy na
Ndịda France, tupu e jiri ya mee ihe n'oge Agha nke Bulge, Agha nke Belgium, Ọrụ Market Garden, na mbuso agha nke Germany site n'ebe ọdịda anyanwụ. M21 jere ozi na US 3rd, 1st, na 7th Armies n'oge mkpọsa na France, na 2nd Armored Division, nke mepụtara ya. Tụkwasị na nke ahụ, a gbazitere ihe atụ 57 nye ndị agha Free French. Ka ọ na-erule afọ 1945, a kwupụtara na ọ bụ ihe mgbe ochie, n'ihi ike na-ezughị ezu nke 81 mm mortar dị ka egbe egbe egbe.