The post that was quoted here has been removedA century ago, the US wasn't a world power. Even at the advent of WWII the US military was a weak sister to Japan, Germany or Russia. During that war, the US outmanufactured the other powers.
We destroyed the Japanese aircraft carrier fleet and built one of our own. Inferior American Sherman tanks simply outnumbered the German panzers that eventually fell victim to a lack of fuel.
It would be a good thing if the US would step back and stop trying to run and protect the world. Like most empires of the past, there are plenty of problems to solve at home.