War of 1812
British who knew about the little war felt that they had won, no matter what Americans thought. Canadians kept their independence from the US and so felt that they had won. The Americans felt they won although they lost in Canada since they lost none of their territory, repelled the invasion of Maryland, were free to fight the Indians without British interference, and were no longer impressed on the high seas. Of all three, the British are perhaps the happiest because they have completely forgotten about the war.