The U.S. government is financially bankrupt and can ill afford to police the world. Unfortunately, U.S. policymakers refuse to reconsider even the most antiquated security promise. The result is strategic bankruptcy as well.
In the aftermath of World War II the U.S. effectively took over the defense of much of Asia and Europe, fought or supported combatants in several Third World proxy wars, engaged in nation-building, and otherwise routinely intervened around the globe.
Despite a changed world, the U.S. continues to defend now wealthy Asian and European client states. American military personnel continue to die fighting in Third World conflicts, only in different nations. Washington continues to attempt to micromanage the globe.