Hard work was required to make progress
The positives were that you actually had a home and the negative was that you had a part of the military. another positive was that you had to chance to cultivate the downside was that you had to give a set amount of your harvested crops to your duke/duchess or whoever owns said land. I hope this will give you some pros and cons to feudalism
America's presence in world affairs would decrease
The Nazi loss in the Battle of the Bulge sealed the Third Reich's fate-- the Allies were free to invade Germany, causing its downfall.