Air power. Armor. Nukes. The rest of the world.
What makes you think the entire literal weight of the world won’t come down on this country? The citizenry is the last obstacle to world domination. Why won’t a billion man army invade?
A billion man army? There aren't that many soldiers in the whole world, my friend. In fact, the armed American populace of 100 million outnumbers the military personnel of every army in the world, combined.
You still hiding under that rock?