The US has already annexed chunks of other countries, mate! Been doing it for years and it is ongoing. Remember Cuba, Panama, Guatemala, the Phillipines, Okinawa, Iraq, Afghanistan, Guam, Diego Garcia, the Marshall Islands, Saudi Arabia, Qatar?! And you can't ignore all the regime changes that the US has, or is in the process of, initiating all around the world. Libya, Syria, Ukraine, Argentina, Colombia, Venezuala!!!
Putin isn't the worry for the world! The biggest threat to world peace are those raving lunatics in the White House and their hangers on in Israel, NATO and the UN!! Absolute thugs!!