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News of this arrived in Europe, where Britain and France unsuccessfully attempted to negotiate a solution. The two nations eventually dispatched regular troops to North America to enforce their claims. The first British action was the assault on Acadia on 16 June 1755 in the Battle of Fort Beauséjour, which was immediately followed by their expulsion of the Acadians. In July British Major General Edward Braddock led about 2,000 army troops and provincial militia on an expedition to retake Fort Duquesne, but the expedition ended in disastrous defeat. In further action, Admiral Edward Boscawen fired on the French ship Alcide on 8 June 1755, capturing it and two troop ships. In September 1755, French and British troops met in the inconclusive Battle of Lake George.

What was the result of the British attack on Ft Duquesne?
the expedition ended in disastrous defeat