When did the US become "friends" with the UK?

This perplexes me. I have tried to research it on my own but have come up empty. The British American Colonies gained independence after the Revolutionary War. Then the British attacked the newly formed United States in 1812, going as far as ransacking and burning the capital city. Then, by the 20th century, the... show more This perplexes me. I have tried to research it on my own but have come up empty. The British American Colonies gained independence after the Revolutionary War. Then the British attacked the newly formed United States in 1812, going as far as ransacking and burning the capital city. Then, by the 20th century, the two arch enemies became close allies and fought not one but two major wars side by side. ?!?!? Huh? Quite frankly, if the two countries had remained enemies, the first major war would have ended differently and the second wouldn't have happened - IMHO.
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