Following the British failure to capture French-controlled Fort Duquesne in the disastrous Braddock Expedition early in the French and Indian War, the British in 1758 finally mounted a second expedition under the command of John Forbes to capture that fort, from which the French and their Indian allies had been organizing raids against British colonial frontier settlements. His expedition methodically constructed a road across the Allegheny Mountains, which had reached a safe place known as Loyal Hannon (near present-day Loyalhanna Township, Pennsylvania) by early September. Forbes' advance force, about 1,500 men under the command of Henry Bouquet then began the construction of Fort Ligonier for the purpose of establishing winter quarters. They were subjected to regular harassment by French and Indian raiding parties sent from Fort Duquesne.