ウィリアム・ヘンリー砦
Following the success of his 1756 assault on Fort Oswego, Montcalm had been seeking an opportunity to deal with the British position at Fort William Henry, since it provided the British with a launching point for attacks against Fort Carillon (now known as Fort Ticonderoga). He was initially hesitant to commit his limited resources against Fort William Henry without knowing more about the disposition of British forces. Intelligence provided by spies in London arrived in the spring, indicating that the British target was probably Louisbourg. This suggested that troop levels on the British side of the frontier might be low enough to make an attack on Fort William Henry feasible. This idea was further supported after the French questioned deserters and captives taken during periodic scouting and raiding expeditions that both sides conducted, including one resulting in the January Battle on Snowshoes.