Relations between Canada and the Republic of Quebec were never very good, Canada had suffered several invasions during the Seven Years War and another one during the American Revolutionary War. It was this threat to its dominion, which made Britain ally with the United States in 1904 and by extension, the German Empire. When the Great War arrived in August 1914, Canada quickly invaded Quebec. However, the republic, despite nearly all aid from France ending after July 1916, was able to hold out for the whole of the war until the capture of Montreal, finally broke the country's back and forced a surrender. Quebec was annexed by Canada.