Mezue ahịrịokwu na-esonụ: Mgbe Japan wakposịrị Pearl Harbor ma mee ka America banye n'agha ahụ na December 7, 1941, "Niblack" nọgidere na-edugharị ụgbọ mmiri ndị si n'Ebe Ugwu Atlantic gaa Reykjavík, Iceland, Derry, Northern Ireland, na Greenock, Scotland. N'ọnwa Julaị n'afọ 1942, e zigara ya na Caribbean maka ọrụ nwa oge n'oge agha U-boat dị ebe ahụ, wee maliteghachi ọrụ ugwu n'ọnwa Ọgọstụ. N'ọnwa Nọvemba 1942, o sooro ndị mbụ na-akwado nkwado na Casablanca mgbe
Ndị agha Allied rutere n'ụsọ oké osimiri Morocco. Ụgbọ mmiri ahụ mechara rụọ ọrụ n'ịgba ụgbọ mmiri ndị dị n'ụsọ oké osimiri ruo mgbe ọ hapụrụ na mbido Mee 1943 maka Mers-el-Kébir, Algeria.