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.

To answer these raids, Bouquet authorized James Grant to lead 750 men on a reconnaissance in force of Duquesne.

Driven back by active British artillery, the French and Indians retreated, and waited for darkness before renewing the attack.

[9] James Smith reported what the French-allied Indians said about the battle: "They met his [Forbes's] army near Fort Ligoneer, and attacked them, but were frustrated in their design.

They said that Forbes's men were beginning to learn the art of war, and that there were a great number of American riflemen along with the redcoats, who scattered out, took trees, and were good marks-men; therefore they found they could not accomplish their design, and were obliged to retreat."

"[4] The British continued work on Ligonier, and after General Forbes arrived on 2 November, advanced on Fort Duquesne in force.