Not to mention the foreign troops deployed to, for instance, the Russian Civil War. Did you know that there were about a quarter of a million troops from about 10-15 different national armies that intervened? I mean US Army deployed ~25,000 troops. British and French Armies together sent ~50-75,000. Imperial Japanese Army sent ~75,000 by itself. Then there were the Czechs, Canadians, Greeks, Romanians, Italians ...
Also, a really big hint of potential 'troll-ness' is the use of the term 'War of 1812' by a European. That's pretty much a term used only by Americans, who couldn't have cared less about what was going on in the rest of the world at the time, and it was just a minor sideshow to what should have been called the First World War, running from about 1792 through 1815. Or, actually off and on since the late 17th century through 1815 or so...