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The Battle of the Scheldt was fought in northern Belgium and southwestern Netherlands in 1944 during the Second World War. It was part of the Allied campaign to liberate northwestern Europe and defeat Nazi Germany. The First Canadian Army played a crucial role in clearing the Scheldt of German forces, opening crucial supply lines via the port of Antwerp. However, this victory came at a cost. The Allies suffered nearly 13,000 casualties during the battle, including more than 6,300 Canadians.

Canada’s longest Second World War army campaign was in Italy. Canadian forces served in the heat, snow and mud of the grinding, nearly two-year Allied battle across Sicily and up the Italian peninsula—prying the country from Germany's grip, at a cost of more than 26,000 Canadian casualties.

The war in Afghanistan (2001–14) was Canada’s longest war and its first significant combat engagement since the Korean War (1950–53). After the 2001 terror attacks on the United States, Canada joined an international coalition to destroy the al-Qaeda terrorist network and the Taliban regime that sheltered it in Afghanistan. (See 9/11 and Canada). Although the Taliban were removed from power and the al-Qaeda network was disrupted, Canada and its allies failed to destroy either group, or to secure and stabilize Afghanistan. More than 40,000 Canadian Armed Forces members served in the 12-year campaign. The war killed 165 Canadians — 158 soldiers and 7 civilians. Many Canadian veterans of the war in Afghanistan suffer from post-traumatic stress disorder.

The Fenians were a secret society of Irish patriots who had emigrated from Ireland to the United States. Some members of this movement tried to take Canadian territory by force, so they could exchange it with Britain for Irish independence. From 1866 to 1871, the Fenians launched several small, armed attacks. Each raid was put down by government forces. Dozens were killed and wounded on both sides. The raids revealed shortfalls in the leadership, structure and training of the Canadian militia, and led to improvements in these areas. The raids also took place at a time of growing concern over the threat posed by American military and economic might. This led to increased support for Confederation.

The Carignan-Salières Regiment was a regiment of French troops who were sent to New France from 1665 to 1667 to fight the Haudenosaunee (Iroquois). These professional soldiers, who had little experience with fighting in the woods, invaded the lands of the Haudenosaunee but did not succeed in defeating them. Nevertheless, the French show of force led to a peace accord in 1667. Though most of the French soldiers then went home, some stayed, married and settled in New France. Many of them married Filles du Roy and now have many descendants. Quebec municipalities such as Berthier, Chambly and Verchères still bear the names of officers of this regiment.

The Seven Years’ War (1756–63) was the first global war. In North America, Britain and France fought each other with the help of Indigenous allies. At the end of the war, France gave Canada (Quebec) and Ile Royale (Cape Breton) to Britain, among other territories. This is the reason that Canada has a British monarch but three founding peoples — French, British and Indigenous.

(This article is a plain-language summary of the Seven Years’ War. If you are interested in reading about this topic in more depth, please see our full-length entry Seven Years’ War.)

The Wartime Elections Act of 1917 gave the vote to female relatives of Canadian soldiers serving overseas in the First World War. It also took the vote away from many Canadians who had immigrated from “enemy” countries. The Act was passed by Prime Minister Robert Borden’s Conservative government in an attempt to gain votes in the 1917 election. It ended up costing the Conservatives support among certain groups for years to come. The Act has a contentious legacy. It granted many women the right to vote, but it also legitimized in law many anti-immigrant sentiments.

The siege of Fort Erie was a British blockade of their own fort located at the entrance to the Niagara River opposite Buffalo, New York, which the Americans had captured on 3 July 1814.

The Napoleonic Wars (1799-1815) were a series of wars between France and shifting alliances between other European powers.

The war on the water was an essential, if not the most important, aspect of the WAR OF 1812. Great Britain was obviously at a disadvantage geographically when trying to defend its colony Canada in a conflict with the United States.

Canada’s war of independence was the First World War. Unlike the Americans, our war of independence was not fought against the country from which we became independent, but alongside it. We started the war as a colony of Britain and ended it as an ally. The remarkable performance of the Canadian Corps and its first Canadian commander made these gains in autonomy possible.

​Canada operated prison camps for interned civilians during the First and Second World Wars, and for 34,000 combatant German prisoners of war (POWs) during the Second World War.

The Holocaust is defined as the systematic persecution and murder of 6 million Jews and 5 million non-Jews, including Roma and Sinti, Poles, political opponents, LGBTQ people and Soviet prisoners of war (POWs), by Nazi Germany from 1933 to 1945. Jews were the only group targeted for complete destruction. Nazi racial ideology considered them subhuman. Though Jewish Canadians did not experience the Holocaust directly, the majority endured anti-Semitism in Canada. Jewish Canadians were only one generation removed from lands under German occupation from 1933 to 1945. They maintained close ties to Jewish relatives in those lands. These ties affected the community’s response to the Holocaust. There was, for instance, a disproportionate representation of Jews in the Canadian armed forces. Jewish Canadians were also heavily involved in postwar relief efforts for displaced persons and Holocaust survivors in Europe.

On the evening of 27 June 1918, while sailing from Halifax, Nova Scotia, to Liverpool, England, the Canadian hospital ship Llandovery Castle was torpedoed and sunk by a German U-boat (U-86). Of the 258 crew and passengers, only 24 survived. Almost all the Canadian Army Medical Corps personnel were killed: six male officers, 64 enlisted men and 14 nursing sisters. Only one lifeboat escaped; the rest were either sucked under as the ship sank or attacked by the U-boat. The submarine’s officers were later charged with committing a war crime.

Remembrance Day is a yearly memorial day that is observed in many Commonwealth countries, including Canada, to remember those who died in military service, and honour those who served in wartime. It is observed across Canada each year on 11 November — the anniversary of the Armistice agreement of 1918 that ended the First World War. On Remembrance Day, public ceremonies and church services often include the playing of “Last Post,” a reading of the fourth stanza of the poem “For the Fallen,” and two minutes of silence at 11 a.m. Wreaths are laid at local war memorials and assemblies are held in schools. Millions of Canadians wear red poppy pins in the weeks leading up to and on 11 November in remembrance. In 2020 and 2021, Remembrance Day services and events were affected by the COVID-19 pandemic. Many events were either held online, cancelled or limited to a small number of participants due to fear of contagion.

The Last Post Fund is a nonprofit organization established in 1909. The organization’s mission is to ensure a dignified funeral and burial, as well as a military-style gravestone, to all eligible veterans. The fund is closely linked to Veterans Affairs Canada.

Exercise Tocsin B was a nationwide nuclear preparedness drill that lasted 24 hours between 13 and 14 November 1961. It was the last of three national survival exercises named Tocsin in 1960–61. It was also the largest and most widely publicized civil defence drill ever held in Canada. This Cold War exercise run by the Canadian Army simulated the impact of thermonuclear warfare in Canada. Its goals were to show how the state would warn Canadians of such an attack and how government would continue during the crisis. By raising popular awareness of the potential for a devastating nuclear attack, Tocsin B showed Canadians what was at stake in the Cold War.