Facing major defeats in the hands of Britain's allies on the European theater of the war and with its navy unable to match the Royal Navy, France was unable to properly supply and support the Canadiens and their indigenous allies. Britain had a string of successes, especially with the Battle of Fort Niagara, and the Franco-Indian alliance started to unravel. At the same time, the British were making promises of support and protection to the natives. Finally, Quebec fell in September following the Battle of the Plains of Abraham.