Earlier quoted context omitted.
There's a huge, gigantic difference between not having a military at all and spending 1 trillion a year to be an imperialist superpower. It's almost like... there's a middle ground.
The thing is, we spend that much and we're not even good imperialists. When was the last time we annexed any territory? Declared a lesser state a protectorate? Or established a new colony? We spend trillions/year to be the world police so our "allies" don't have to while they mock us on twitter.
If you can stage a coup or rile up and train a militia to fight your proxy war, there is no need for an outdated notion of "imperialism".
The US has the most powerful military the world has ever seen, and that power is not simply being tossed into the dumpster.