Nov 1917—Oct 1922: Russian Civil War Russian Civil War
2
1939
1 Sep 1939—2 Sep 1945: World War II World War II
3
1970
1970—16 Oct 1970: War Measures Act Prime Minister Pierre Trudeau evokes the martial law powers of the War Measures Act to crack down on separatist terrorists in Quebec following the assassination of vice-premier Pierre Laporte.
1922 - 1977 (55 years)