It wasn’t until after WW2 that Newfoundland became a part of Canada. I don’t know how true this is, but I read somewhere that Newfoundland kicked around the idea of merging with the US after the war - the US had some important military bases in Newfoundland. Maybe they were grateful to the Americans for bringing indoor plumbing to the future province.Not that I have anything to contribute to it, but on 1 July, 1867 the Dominion of Canada was established from the several colonial possessions of Great Britain.
It deserves a mention, I think.
EDIT: Interestingly, it appears that Prince Edward island and New Foundland both retained their colonial status for some time after 1867.
My family visited Newfoundland briefly on a stopover from Amsterdam in 1947 before it became a part of Canada. Gander airport was filled to bursting with DC3s returning from Europe, which is my main memory of the place.