Sure, but after they move on you're left with nothing but your homes burnt down and your family dead, while they're still the largest economic and military power in the world living it up in their first-world mansions. Pyrrhic victories taste just like defeat.

The american airforce and navy are quite small (thousands of ships). A well placed strike force couple wipe the whole thing out. And then you're back to guys with rifles, unless you're going to start dropping nukes.