Canada at War and at Peace(keeping)

Canada in the First World War (1914-1919)

When Britain declared war on Germany in August 1914, Canada, as a dominion of the British Empire, was automatically drawn into the conflict. Though the country’s regular army was small, enthusiasm for enlistment was immediate and overwhelming. More than 600,000 Canadians served in uniform, and their efforts on the Western Front soon earned them a reputation for determination and skill. The Canadian Expeditionary Force fought in some of the war’s most brutal battles—Ypres, the Somme, Passchendaele, and notably Vimy Ridge in 1917. The victory at Vimy Ridge became a symbol of national pride and unity, marking the moment many historians see as the birth of modern Canadian nationhood. Canada’s soldiers fought under their own command for the first time, demonstrating tactical innovation and resilience. The war’s cost was immense: about 61,000 Canadians were killed and 172,000 wounded. On the home front, industrial production and women’s participation in the workforce increased dramatically, reshaping the country’s economy and social structure. At war’s end, Canada gained international recognition by signing the Treaty of Versailles independently and securing a seat in the newly formed League of Nations. The First World War thus transformed Canada from a colony into a more autonomous nation, forged through shared sacrifice and loss.

The Russian/Siberian Expedition (1918–1920)

At the end of the First World War, Canada joined a multinational intervention in Russia, known as the Siberian Expedition, intended to influence the outcome of the Russian Civil War and support the Allied war effort against Germany. Following the Bolshevik Revolution of 1917, Russia withdrew from the war, freeing German forces to concentrate on the Western Front. The Allies sought to reopen the Eastern Front, protect military supplies at the port of Vladivostok, and aid anti-Bolshevik “White” forces. In late 1918, Canada authorized the deployment of about 4,200 troops—the Canadian Siberian Expeditionary Force (CSEF)—to Vladivostok. The mission, however, was politically controversial at home; the war had just ended, and public support for further fighting was low. Many soldiers were reluctant conscripts who had expected to be demobilized after the Armistice. The expedition ultimately saw little combat. Harsh conditions, political confusion, and growing disillusionment led to widespread dissent among the troops. By the summer of 1919, the CSEF was withdrawn without ever engaging in major hostilities. The intervention failed to alter the course of the Russian Civil War, which ended with Bolshevik victory. For Canada, the Siberian Expedition reflected both its deepening involvement in international affairs and the limits of public willingness to support distant imperial ventures. It also foreshadowed Canada’s postwar shift from unquestioning imperial loyalty toward a more cautious, independent foreign policy—one that would increasingly value diplomacy and domestic consensus over imperial obligation.

Canada in the Second World War (1939-1945)

Canada entered the Second World War on September 10, 1939—one week after Britain—asserting its independent authority to declare war. Over the next six years, more than one million Canadians served in the army, navy, and air force, contributing significantly to Allied success. The Royal Canadian Navy expanded from a small coastal force to one of the largest navies in the world, escorting convoys across the treacherous North Atlantic. The Royal Canadian Air Force played a crucial role through the British Commonwealth Air Training Plan, which trained over 130,000 Allied aircrew in Canada. Canadian troops fought courageously in the disastrous Dieppe Raid (1942), the Italian Campaign (1943–45), and the D-Day invasion of Normandy, where they secured Juno Beach and helped liberate France and the Netherlands. On the home front, Canada became an industrial and agricultural powerhouse, producing vast quantities of food, weapons, and vehicles. Women entered the workforce in record numbers, fueling social change that would continue after the war. With over 45,000 Canadians killed and 55,000 wounded, the human cost was heavy, yet the war solidified Canada’s position as a middle power dedicated to international cooperation. In its aftermath, Canada helped found the United Nations and emerged as a respected voice in global diplomacy.

Canada in the Korean War (1950-1953)

The Korean War marked Canada’s first major military action under the banner of the United Nations. When North Korean forces invaded South Korea in June 1950, Canada responded quickly, contributing naval, air, and ground units to the multinational effort to repel the invasion. Over 26,000 Canadians served during the conflict, making it Canada’s third-largest overseas military commitment of the century. The Royal Canadian Navy provided patrol and escort services along the Korean coast, while the Royal Canadian Air Force supported the war through airlift and logistical operations. The Canadian Army’s 25th Infantry Brigade joined the front lines in 1951, distinguishing itself in several engagements, including the Battle of Kapyong, where Canadian troops held firm against a massive Chinese assault and earned a U.S. Presidential Unit Citation. Though fighting ended with the 1953 armistice, the war’s human toll included more than 500 Canadians killed. The Korean conflict reinforced Canada’s role as a reliable ally and peacekeeper, committed to collective defense through the United Nations and NATO. It also marked the beginning of Canada’s broader participation in Cold War security, setting the stage for its later peacekeeping missions and solidifying its international reputation as a middle power devoted to stability and humanitarian principles.

Canada as Peacekeepers and United Nations Missions

Peacekeeping has long been central to Canada’s international identity, rooted in a postwar commitment to diplomacy, cooperation, and humanitarian values. The defining moment came during the 1956 Suez Crisis, when then–Foreign Minister Lester B. Pearson proposed the creation of the first United Nations Emergency Force to separate warring parties in Egypt—an initiative that earned him the Nobel Peace Prize and established Canada as a leader in peacekeeping. Over the next several decades, thousands of Canadian soldiers served in missions in Cyprus, the Sinai Peninsula, the Golan Heights, and the Congo, where they provided stability, monitored ceasefires, and protected civilians. During the 1990s, Canada contributed to challenging operations in Rwanda, Somalia, and the Balkans, where peacekeeping often blurred into peace enforcement amid complex civil conflicts. These experiences exposed the limitations of UN mandates and strained Canada’s peacekeeping tradition. In recent decades, Canada’s role has shifted toward specialized support, including airlift, training, and command contributions—such as its leadership in the UN mission in Mali (2018–2019). Although the scale of participation has declined, the peacekeeping legacy remains a defining feature of Canada’s foreign policy and global image, symbolizing its dedication to international cooperation, humanitarian protection, and the maintenance of global peace.

Canada and NATO Coalition Missions (Post–Cold War to Present)

Canada has been a founding and active member of the North Atlantic Treaty Organization (NATO) since 1949, and its post–Cold War contributions have reflected a transition from traditional defense to global crisis management. During the 1990s, Canadian troops played a central role in NATO-led peace enforcement missions in the Balkans, particularly in Bosnia and Kosovo, where they worked to protect civilians, enforce ceasefires, and stabilize war-torn regions. The early 2000s brought Canada’s most extensive modern combat operation under NATO command in Afghanistan. From 2001 to 2014, over 40,000 Canadian soldiers served under the International Security Assistance Force (ISAF), focusing on counterinsurgency, reconstruction, and training in Kandahar Province. The mission came at a high cost—158 Canadians lost their lives—but it underscored Canada’s willingness to share the burdens of international security. In recent years, Canada has maintained its NATO commitments through Operation Reassurance, deploying troops to Latvia, aircraft to Eastern Europe, and ships to the North Atlantic in response to renewed tensions with Russia. These ongoing efforts highlight Canada’s evolution from peacekeeping to proactive engagement within multinational coalitions, demonstrating its enduring commitment to collective defense, stability, and global security under NATO’s changing mandate.

Canada’s Military Contribution to the Gulf War (1990–1991)

Canada’s participation in the 1990–1991 Gulf War represented one of its most significant combat engagements since the Korean War. When Iraq invaded Kuwait in August 1990, Canada joined the U.S.-led coalition under United Nations authorization to restore Kuwaiti sovereignty. The Canadian Armed Forces launched Operation Friction, deploying both naval and air assets to the Persian Gulf. Three warships—HMCS Terra Nova, Athabaskan, and the supply ship Protecteur—enforced the UN’s maritime embargo and later supported combat operations during Operation Desert Storm. In addition, a squadron of CF-18 Hornet fighter jets, based in Qatar, flew air patrols, escort missions, and provided limited air support for coalition forces. Canada also contributed medical personnel, logistics teams, and transport aircraft to support humanitarian and evacuation efforts. Although the scale of Canada’s combat operations was modest compared to major coalition partners, the mission demonstrated Canada’s ability to participate effectively in high-intensity warfare while upholding multilateral principles through the UN framework. The Gulf War reinforced Canada’s reputation as a reliable coalition partner and marked a shift from traditional peacekeeping roles toward more assertive participation in collective security operations under international law.

The Afghanistan Mission (2001–2014)

Canada’s involvement in Afghanistan was its longest and most complex military operation. It began in late 2001, following the September 11 terrorist attacks, when Canada joined the U.S.-led coalition to overthrow the Taliban regime that had sheltered al-Qaeda. Initially, Canadian forces participated in the early combat operations around Kandahar, later contributing to the International Security Assistance Force (ISAF) under NATO command. Over the course of the mission, more than 40,000 Canadian Armed Forces personnel served in Afghanistan in both combat and support roles. From 2006 to 2011, Canada assumed a leading role in Kandahar Province—one of the most volatile regions—conducting counterinsurgency operations, training Afghan security forces, and implementing reconstruction and humanitarian projects.

The mission was marked by intense fighting and significant sacrifice: 158 Canadian soldiers were killed, and more than 2,000 were wounded. The deployment sparked national debate about Canada’s military identity, the human cost of intervention, and the balance between combat and peacebuilding. In 2011, Canada ended its combat operations and transitioned to a training mission in Kabul, which concluded in 2014. Though Afghanistan remained unstable after the eventual NATO withdrawal, Canada’s mission left a complex legacy—showing the capabilities and professionalism of its forces while also prompting reflection on the limits of military power in achieving lasting peace. The Afghanistan War reaffirmed Canada’s commitment to collective security through NATO and demonstrated both the challenges and responsibilities of modern international engagement in the 21st century.