The most important French fort planned was intended to occupy a position at "the Forks" where the Allegheny and Monongahela Rivers meet to form the Ohio River (present day Pittsburgh, Pennsylvania). Peaceful <answer>British attempts to halt this fort construction were unsuccessful</answer>, and the French proceeded to build the fort they named Fort Duquesne. British colonial militia from Virginia were then sent to drive them out. Led by George Washington, they ambushed a small French force at Jumonville Glen on 28 May 1754 killing ten, including commander Jumonville. The French retaliated by attacking Washington's army at Fort Necessity on 3 July 1754 and forced Washington to surrender.
Were the British successful in stopping the building of Fort Duquesne?
British attempts to halt this fort construction were unsuccessful