Key Events & Battles, French & Indian War ?Event Date Location Notes/Significance British defeated at Ft. Duquesne 1755 Western Pennsylvania (present-day Pittsburgh) Gen. Braddock's force of 1450 men surrounded and defeated by Indian and French-Canadian forces American colonists refuse to serve under British commander 1757 American colonies New British commander (Lord Loudoun) closely managed the war effort, demanding exact numbers of recruits and money from colonies. Colonial assemblies began to refuse to cooperate. French take Ft. Osage 1756 Upstate New York French commander Montcalm takes fort, but is horrified to discover that his Indian allies kill wounded soldiers, take scalps, and make slaves of captives. Massacre at Ft. William Henry 1757