World War II was the last war the U.S. fought as a sovereign nation against other sovereign nations.
Since World War II, every U.S. military conflict has involved the U.S. as a global empire building and maintaining its foothold in other countries. That's why these military campaigns were fought using "half measures." You can lay waste to an enemy nation and leave it as a smoking ruins if you are fighting for the survival of your country, but that approach is pointless and completely defeats the purpose when the aim of your military campaign is to defeat your enemy so you can do business with him.
but that approach is pointless and completely defeats the purpose when the aim of your military campaign is to defeat your enemy so you can do business with him.