A cikin watan Yuli 1941, Althingi ya amince da yarjejeniyar kare Amurka da Iceland, yana ba da alhakin kare Iceland ga Amurka. Har zuwa sojoji 40,000 na Amurka sun kasance a tsibirin, suna wuce yawan mazaunan maza. (Dukan mazaunan ƙasar Iceland a lokacin yakin sun kasance kimanin 120,000.) Tambaya: Menene mafi yawan sojojin Birtaniya a Iceland?
kimanin sojoji 25,000