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====Agressive Expansion of United States territory by Secretary of States - William Seward====

In the north, fears of a resurgent United States and calls by some U.S. politicians for the annexation of British North American territory allowed Canadian politicians to overcome their own sectional differences, while also spurring British parliamentary leaders to urge a stronger central government in British North America, especially after Irish-born civil war veterans launched several unsuccessful raids into Canada. This resulted in the British North America Act of 1867, which united Ontario, Quebec, Nova Scotia, and New Brunswick. Subsequently, in 1870, Canadian Prime Minister John MacDonald successfully convinced the British Government to cede the lands of the Hudson’s Bay Company to Canada, crushing the hopes of U.S. expansionists who hoped to acquire those lands for the United States.