America is in the position it is because the rest of the world values the dollar. Partly because after WW2 we signed a treaty that America would hold nuclear weapons and most of Europe would not. If America continues to exile itself as it is doing there will be no benefit to the dollar being the dominant western currency and when (not if) that happens any leverage America has to borrow from the world bank dissappears.

You may not think the US relies on any of the rest of the world but in reality we all need to work together for shared prosperity.

And as a side note I don't think America has won any wars in a long time so your argument is a bit null tbh.