 Nokuti Britain yakanga ichiri kudzora zvematongerwe enyika zveCanada pasi peBritish North America Act, 1867, kuzivisa kwayo hondo muna 1914 kwakangoerekana kwapinza Canada muHondo Yenyika I. Vazvipiri vakatumirwa kuWestern Front gare gare vakava rutivi rweCanada Corps, iyo yakaita basa rinokosha muHondo yeVimy Ridgeuye dzimwe nharo huru dzehondo. Pavanhu vokuCanada vanenge 625 000 vakashanda muHondo Yenyika I, vanenge 60 000 vakaurayiwa uye vamwe 172 000 vakakuvadzwa. The Conscription Crisis ya1917 yakaputika apo chikumbiro cheUnionist Cabinet chokuwedzera nhamba inoderera yenhengo dzechiuto dzinoshingaira nechisungo chakasangana nekushora kwakasimba kubva kuQuebecers vanotaura chiFrench. Mutemo Webasa Rechiuto wakaunza basa rechiuto rokumanikidzirwa, kunyange zvazvo, pamwe chete negakava pamusoro pezvikoro zvomutauro wechiFrench kunze kweQuebec, zvakanyatsoparadzanisa vaCanada vanotaura chiFrench uye kwenguva pfupi vakaparadzanisa Liberal Party. Muna 1919, Canada yakabatana neLeague of Nations yakazvimirira neBritain, uye Mutemo weWestminster wa1931 wakasimbisa kuzvimirira kweCanada. 