Sure that's potentially one effect- but I'm not sure it's the most important. The other effect is to reduce international trade and the kind of national interd

Sure that's potentially one effect- but I'm not sure it's the most important. The other effect is to reduce international trade and the kind of national interdependency that creates, and so makes, large scale war highly unlikely. The US is also trying to use it's economic power to force people to choose sides ( cf secondary sanctions on India ). So while Trump might be anti-forever wars he is busy creating a world where WWIII is much more likely.