Background
The French and Indian War (1754–1763) pitted the colonies of British America against those of New France, each side supported by military units from the parent country and by American Indian allies. At the start of the war, the French colonies had a population of roughly 60,000 settlers, compared with 2 million in the British colonies. The outnumbered French particularly depended on the Indians.
French irregular forces (Canadian scouts and Indians) harassed Fort William Henry throughout the first half of 1757. In January, they ambushed British rangersnear Ticonderoga. In February, they launched a raid against the position across the frozen Lake George, destroying storehouses and buildings outside the main fortification. In early August, Montcalm and 7,000 troops besieged the fort, which capitulated with an agreement to withdraw under parole. When the withdrawal began, some of Montcalm’s Indian allies attacked the British column because they were angry about the lost opportunity for loot, killing and capturing several hundred men, women, children, and slaves.
https://en.wikipedia.org/wiki/French_and_Indian_War
