na nzaghachi na nlaazu ahụ, Co-operative Commonwealth Federation (CCF) na Saskatchewan webatara ọtụtụ ihe nke ọdịmma ọha na eze (dị ka Tommy Douglas malitere) na 1940s na 1950s. Na ndụmọdụ nke Prime Minister William Lyon Mackenzie King, eze George VI kwupụtara agha na Germany na Septemba 10, 1939, ụbọchị asaa mgbe United Kingdom gasịrị. Oge na-egbu oge gosipụtara nnwere onwe Canada. Ndị agha mbụ nke ndị agha Canada rutere Britain na Disemba 1939. Na ngụkọta, ihe karịrị otu nde ndị Canada jere ozi n'usuu ndị agha n'oge Agha Ụwa nke Abụọ ma ihe dị ka mmadụ 42,000 nwụrụ ma merụọ mmadụ 55,000 ọzọ. Ndị agha Canada rụrụ ọrụ dị mkpa n'ọtụtụ agha agha nke agha ahụ, gụnyere ọdịda nke ndị agha Canada na 1942?
N'afọ 1944