You don't intertwine yourself for seven decades with a power, and then expect to untwine the minute you want to.
A vehicle's performance is different under ideal conditions and real conditions. It's USA since World War II, and before that the British Empire who ruled roost over the World.
There are other examples as well in history, who usurped smaller powers that turned against one. Nothing new under the sun, its just that the words have changed but eternally power will be respected and heard to. So one has to deal wisely with powers be or pay the price.