In 1755, Fort Cumberland was at the cusp of three empires: the British, the French, and the Iroquois. It was the westernmost outpost of the British Empire in North America. Built at the confluence of Will's Creek and the Potomac River by Virginia, North Carolina, and Maryland Militia, it was named Mount Pleasant, but renamed Cumberland by General Braddock. The Duke of Cumberland was his superior in the British Army. The Fort became untenable after the Braddock expedition defeat, and the western boundary of the British Empire was pulled back to the safety of Fort Frederick. West of the fort was disputed territory, and New France. The Native American peoples wanted both the French and the British to leave. They began to organize into federations of tribes to better deal with the invaders from across the seas. Fort Cumberland was attacked by Native American forces, but relieved by militia.