The Conquest of New France (French: La Conquête) – the military conquest of New France by Great Britain during the Seven Years' War of 1756 to 1763 – started with a British campaign in 1758 and ended with the region being put under a British military regime between 1760 and 1763. Britain's acquisition of the New France colony of Canada became official with the 1763 Treaty of Paris that concluded the Seven Years' War.
The term is usually used when discussing the impact of the British conquest on the 70,000 French inhabitants, as well as on the First Nations. At issue in popular and scholarly debate ever since is the British treatment of the French population, and the long-term historical impact for good or ill.

Although the
military of New France saw early success during the
Seven Years' War, a series of campaigns between 1758 and 1760 saw the British capture most of the French colony of
Canada.
The conquest represents the final episode of a long series of conflicts between Britain and France over their North American colonies. In the decades preceding the Seven Years' War and the Conquest of New France, both Britain's and France's interest toward their North American colonies rapidly grew and the region became an important source of tensions between the two powers. British America became a very lucrative export market during the first half of the 18th century and gained in importance in the eyes of British policymakers. The growing economic value of the North American colonies convinced many influential members of the British public that those colonies should be expanded and that France's territorial claims on the continent should not be allowed to stand in the way.[1]: 2–5 Furthermore, the nature of the British Empire fundamentally changed in the years following the War of the Austrian Succession; moving from a maritime and commercial empire to a more centralized and controlled empire. This change encouraged the British government to increase its commitments toward its North American colonies and their backcountry (for example, the Ohio Valley).[2]: 24
In opposition to the British, France did not justify the defence of its colonies through economic interests. On the contrary, many French policymakers believed that the colony was an economic drain for France and argued that its value was mostly strategic. France's leaders felt it would be difficult to compete with the Royal Navy and were afraid that Great Britain's maritime superiority could threaten its profitable colonies in the West Indies as well as its standing in Europe.
Almost an afterthought for London and Versailles was the fact that these desired lands were already populated by Indigenous bands (different groups or tribes) that had a long history fighting each other. Each band was keen to have a strong ally that could provide sophisticated weapons and other desirable items, not least of which was alcohol. Alliances were finicky. The French had a better relationship based mainly on the fur trade. The British could be more generous with land treaties[citation needed] and weapons. Issues emerged about trust.