Seven Years' War | The Canadian Encyclopedia


Seven Years' War

The Seven Years' War (1756–63) was the first global war, fought in Europe, India, America, and at sea. In North America, imperial rivals Britain and France struggled for supremacy. In the United States, the conflict is known as the French and Indian War. Early in the war, the French (aided by Canadian militia and Indigenous allies) defeated several British attacks and captured a number of British forts. In 1758, the tide turned when the British captured Louisbourg, followed by Quebec City in 1759 and Montreal in 1760. With the Treaty of Paris of 1763, France formally ceded Canada to the British. The Seven Years’ War therefore laid the bicultural foundations of modern Canada.

This is the full-length entry about the Seven Years’ War. For a plain-language summary, please see Seven Years’ War (Plain-Language Summary).

Map of the Seven Years' War in North America.
The Death of General Wolfe
Declaration of War, Seven Years War
A View of the Taking of Quebec, September 13th, 1759
View of the Basse-Ville in Québec destroyed by British artillery fire, 1759
Marquis de Montcalm, military commander

Causes of the Seven Years’ War

The Seven Years' War pitted the alliance of Britain, Prussia and Hanover against the alliance of France, Austria, Sweden, Saxony, Russia, and eventually Spain. The war was driven by the commercial and imperial rivalry between Britain and France, and by the antagonism between Prussia (allied to Britain) and Austria (allied to France). In Europe, Britain sent troops to help its ally, Prussia, which was surrounded by its enemies. However, the main British war aim was to destroy France as a commercial rival, and they therefore focused on attacking the French navy and colonies overseas. France was committed to fighting in Europe to defend its ally, Austria. It therefore had few resources to spare for its colonies.

Hostilities in North America, 1754–55

Hostilities began in 1754 in the Ohio Valley, which both the French and British had claimed. In 1753, the French built fortifications in the area to strengthen their claim. In response, the governor of Virginia (then a British colony) sent militia colonel George Washington to the Ohio frontier. Washington ambushed a small French detachment but was then defeated by a larger French force.

Even though war had not yet been officially declared, the British began planning an assault against the French in America. Major-General Edward Braddock and two regular regiments were sent to America in 1755. Other regiments would be raised in the colonies, and a four-pronged attack would be launched against Niagara, Fort Beauséjour on the border of Nova Scotia, Fort Duquesne on the Ohio River, and Fort Saint-Frédéric [Crown Point] on Lake Champlain (in what is now New York state).

On learning of these movements, the French ordered six battalions under Baron Armand Dieskau to reinforce Louisbourg and Canada. Vice-Admiral Edward Boscawen and a squadron of the British navy tried to intercept and capture the French convoy but captured only two ships. The British had even less success on land. The army advancing on Lake Champlain fought the French near Lake George, capturing Dieskau, but decided to abandon the campaign against Fort Saint-Frédéric. Instead, they strengthened their position at the opposite side of the lake, where they built Fort William Henry. The proposed assault on Niagara collapsed due to supply problems and heavy desertion, and Braddock's army was destroyed by a small detachment of French soldiers and Indigenous warriors. However, the British had some success in Acadia, capturing Fort Beauséjour with its small garrison in 1755. The Acadian settlers were then deported, as the British viewed them as potential rebels (see History of Acadia).

Early French Victories

In April 1756, more French troops and a new commander, the marquis de Montcalm, arrived in Canada. The next month Britain declared war. The strategy of the French commander-in-chief and governor general, the marquis de Vaudreuil, was to keep the British on the defensive and as far from Canadian settlements as possible. Montcalm captured the British Fort Oswego on Lake Ontario in 1756 and thereby gained control of the Great Lakes. In August 1757, the French also captured Fort William Henry on Lake George.

At the same time, Canadian and Indigenous war parties attacked American frontier settlements. The Americans could not cope with these attacks and Britain was forced to send over 20,000 troops to the colonies and commit most of its navy to blockading the French ports. The French plan was to use a small army, aided by the Canadians and Indigenous allies, to tie down these large British forces in the interior, thereby sparing more valuable colonies such as Guadeloupe from attack. Despite the large numbers of British regulars arriving in North America, the French government refused to send more than token troop reinforcements.

The Tide Turns: British Victories

In 1758, the tide of war turned against the French, with the British launching several major attacks on French posts. In July, Major-General James Abercromby, with an army of over 15,000 British and American troops, attacked Fort Carillon (Ticonderoga). They were defeated by Montcalm and a force of only 3,800 men. However, the British also launched a successful amphibious attack on Louisbourg that summer, which opened up the St. Lawrence River to British ships. In August 1758, the British destroyed Fort Frontenac [Kingston, Ontario] with its stock of supplies for the western posts. France's Indigenous allies in the Ohio region made a separate peace with the British, forcing the French to abandon Fort Duquesne.

In 1759, the British captured Guadeloupe in the Caribbean, and mounted three campaigns against French fortifications on the mainland. Two British armies advanced on Canada while a third captured Niagara. The Royal Navy brought Major-General James Wolfe with 9,000 men to Quebec, while General Jeffery Amherst advanced up Lake Champlain, only to halt at Crown Point. Wolfe tried to lure the French into open battle throughout the summer, attacking outposts and settlements while laying siege to the city. On 13 September 1759, a British force of 4,500 men landed about 3 km upriver of Quebec. Instead of waiting for reinforcements, Montcalm decided to attack. The British inflicted a shattering defeat in the Battle of the Plains of Abraham. Both Wolfe and Montcalm died from wounds sustained during the battle. The city surrendered a few days later.

Yet the British position at Quebec was weak; the Royal Navy withdrew from the area before the winter, leaving the British garrison there isolated. The chevalier de Lévis took over command of the French army. The following April, he soundly defeated the British on the same battlefield (see Battle of Ste-Foy). The British retreated to Quebec, and Lévis set siege to the city. On 16 May, he had to abandon the siege when British frigates arrived in the St. Lawrence River, ending all hope of French reinforcements. The French army retired to Montreal and was forced to surrender to Amherst on 8 September 1760 (see Conquest). This freed the British forces for service elsewhere.

View of the Basse-Ville in Québec destroyed by British artillery fire, 1759

British Naval Dominance

The dominance of the British navy was a deciding factor in the outcome of the war. The navy played a crucial role in the attacks on Louisbourg and the city of Quebec, and successfully stopped French ships from reaching the colonies. It also defeated the French plan to invade Britain. France and Spain had organized a major expedition for the invasion of England, but the British naval victories at Lagos, Portugal, in August and Quiberon Bay, France, in November 1759 made this impossible.

Final Stage

Despite military and naval victories, the British were staggering under a colossal national debt by 1760. The war minister, William Pitt, urged the government to declare war on Spain, which made a defensive alliance with France in August 1761. But the new king, George III, wanted peace. By the end of the year, Pitt had been driven out of office.

The war would not end, however, until 1763. Britain declared war on Spain in January 1762 and continued its operations overseas. In February and March 1762, the British took Martinique, St. Lucia, Grenada and St. Vincent. They captured Havana from the Spanish in August, followed by Manila in October 1762.

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The Treaty of Paris 1763

Meanwhile, the governments of Britain, France and Spain were negotiating peace terms. The first minister of the French government, the duc de Choiseul, was determined to regain the valuable sugar colonies of Martinique and Guadeloupe, and to keep a base for the Grand Banks fisheries. He also wanted Cape Breton, but had to settle for the tiny islands of St-Pierre and Miquelon as a fishing station.

Britain agreed to return Martinique and Guadeloupe to France but secured the West Indian islands of Dominica, Tobago, St. Vincent and Grenada. Spain surrendered Florida to the British, but received part of France’s vast Louisiana territory. (See Treaty of Paris 1763.)

France also left New France to Britain, as it was less valuable commercially than either the sugar islands of the West Indies or the fishing islands of the north Atlantic. The size and location of New France also made it an expensive colony to defend and maintain.

In addition, Choiseul was convinced that the American colonies, which no longer needed British military protection, would soon strike out for independence. Twelve years later, the American colonies rose in revolt against Britain. Ironically, it was only with the military aid of the French that they finally gained their independence. (See American Revolution.)

The Treaty of Paris was signed by Britain, France and Spain on 10 February 1763. The Treaty of Hubertusburg was signed on 15 February 1763 by Prussia, Austria and Saxony and ended the war in central Europe.


The Seven Years' War was a crucial turning point in Canadian history. With the Treaty of Paris of 1763, France formally ceded New France to the British, and largely withdrew from the continent. The Seven Years’ War therefore laid the bicultural foundations of modern Canada. However, the removal of France as a North American power gave Anglo-American colonists greater confidence, as they no longer needed the protection of the British military. This led indirectly to the outbreak of the American Revolution in 1775, which would further influence Canadian identity and boundaries, including the influx of Loyalists and the creation of Upper Canada and New Brunswick.

The war also changed the relationship between Britain and Indigenous peoples living in what would become Canada. In the spring of 1763, an Indigenous confederacy under Odawa chief Obwandiyag (Pontiac) seized British military posts in the Great Lakes area. Many First Nations had allied with France during the war and protested American settlement and British policies under Jeffery Amherst. The British government wanted to secure their allegiance and loyalty and stabilize the western frontier. It therefore issued the Royal Proclamation of 1763, which created a vast Indigenous reserve west of the Appalachian Mountains. In addition, it stated explicitly that Indigenous people reserved all lands not ceded by or purchased from them. The Proclamation also included policies meant to assimilate the French population to British rule; these were later replaced by the Quebec Act, 1774.

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