After the 1763 Treaty of Paris, in which the French ceded their North American territories to the British, the fort was no longer on the frontier of two great empires, guarding the principal waterway between them.
The fort was no longer on the frontier of two great empires, guarding the principal waterway between them. This was after the 1763 Treaty of Paris. The French ceded their North American territories to the British in the 1763 Treaty of Paris.