Wars involving Canada

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. Tanks and aircraft played major roles, the latter enabling the strategic bombing of cities and delivery of the only nuclear weapons used in war. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Major areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. The war saw important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 15 to 22 million military and civilian casualties and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

war between North and South Korea, 1950–1953

The Gulf War was an armed conflict between Iraq and a 42-country coalition led by the United States. The coalition's efforts were in two phases: Operation Desert Shield, which marked the military buildup from August 1990 to January 1991; and Operation Desert Storm, from the bombing campaign against Iraq on 17 January until the American-led liberation of Kuwait on 28 February.

conflict between the United States and the British Empire from 1812 to 1815

armed conflict between NATO countries and Afghanistan from 2001 to 2021

military campaign started after September 11 attacks

frontier conflicts between American, Canadian and European settlers and Indigenous peoples of the Americas

North American theater of the War of the Austrian Succession

military mobility in between 1866-1870

military struggle for control of the Great Lakes region in North America, encompassing a number of wars over several generations