Kammala jumla mai zuwa: Firayim Minista William Lyon Mackenzie King, yana aiki tare da Ministan Harkokin Wajensa Louis St. Laurent, ya kula da dangantakar kasashen waje 1945-1948 a cikin hanyar da ta dace. Kanada ta ba da kuɗi ga United Kingdom don taimaka mata sake ginawa; an zabe shi zuwa Kwamitin Tsaro na Majalisar Dinkin Duniya; kuma ya taimaka wajen tsara NATO. Duk da haka, Mackenzie King ya ki amincewa da cinikayya tare da Amurka, kuma ya yanke shawarar kada ya taka rawa a cikin
Jirgin sama na Berlin. Kanada ta shiga cikin League of Nations, musamman saboda tana iya yin aiki daban da Biritaniya. Ya taka rawar gani a cikin kafa Majalisar Dinkin Duniya bayan yakin, da kuma Asusun Ba da Lamuni na Duniya. Ya taka rawar gani a cikin 1947 wajen tsara Yarjejeniyar Janar kan Tariffs da Ciniki.