In the early years of the United States, many American political figures were in favour of invading and annexing Canada, and even pre-approved Canada's admission to the U.S. in the Articles of Confederation in 1777.
在早期的美国，许多政治人物赞成侵略或吞并加拿大，甚至预先批准加拿大加入美国在1777年制訂的《邦联条例》。