You can hate the US all you want, but I would defy you to name me any other country that wins a war and sticks around to rebuild it. The US rebuilt Germany and Japan also.
Answer - Alexander did it throughout his campaigns. A number of Roman leaders did it. As did Charlamagne, William of Orange and Peter the Great. Just don't do the war. The U.S. devastated Iraq and then stole $9 Billion during the first part of the occupation. The reparations funds are filtered through private U.S. companies with the inside track to the White House. And yet many Iraqi do not have electricity, running water, safe streets or a government that reflects the will of the People.
A draft is likely and Canada should open its borders to those Americans of conscious who oppose the war. I worked with the dodgers and deserters from the Viet Nam period. Wonderful people seeking help from a neighbor as their house collapses.