 In 1758, when British forces launched a major campaign to remove French forces from the forks of the Ohio, now Pittsburgh, this spot on Loyalhanna Creek was the site of their westernmost camp before reaching the Ohio.The British maintained a large army, a virtual moving city of 6,000 people, that temporarily made this the most populated spot in Pennsylvania, second only to Philadelphia.The fort was named Fort Ligonier after John Ligonier, a British noble of French origin who held the rank of Field Marshal in the British Army.