After the Treaty of Utrecht the British and French colonies in North America, though separated by a vast wilderness, became increasingly apprehensive of one another.

In the short term, the French colonies were in the stronger position. Their power was based on the riches of the wilderness itself, economically on furs, militarily on water communications and diplomatically on manipulating the Indian tribes. The conditions of the fur trade made it possible for the Governor-General, the Company and the Church, all operating from the St Lawrence valley, to control a vast and very sparsely populated hinterland. The weakness of the French colonies came, however, from this adaptation to the conditions of the wilderness and in the end was to outweigh the sources of strength. The French fur trade only required a very few men: the French did not settle in numbers large enough to develop agriculture or industry or even to provide enough soldiers. The exploitation of the forests soon reached a point of diminishing returns. Traders went even further into the hinterland and relations had to be established with even more distant Indian tribes. Concentration on the fur trade meant reliance on France for provisions, manufactures and weapons. The existence of New France depended on command of the sea and particularly the control of the approaches to the St Lawrence which was threatened by British occupation of Newfoundland and of Acadia. In the circumstances, the best hope for the French colonies was to pursue a boldly offensive policy, and by using the initiative which their centralised planning gave them they managed, between 1713 and 1754, to extend their power from the Mississippi and the Great Lakes to the Appalachians.