> US joined WW2 by the very end when it was evident that Germany lost
Bollocks. The US joined the war because they cut off oil supplies to Japan and Japan saw future conflict as inevitable -- and struck first. They bombed Pearl Harbor in 1941 -- and the war didn't end until 1945. In 1941 Germany had beaten France, the UK, Norway, Denmark, and was on a path to steamroll Yugoslavia, Greece, and possibly the USSR.
> just in time to colonize its share of Europe that remains colonized to this day.
The US military is still in Europe because the NATO is fine with the US footing the cost of defense spending. "Colonized" my fat ass, the reason the EU is able to throw around grand farm subsidies is because the US is paying for missile defense and aircraft carriers.