Trump’s doctrine is simple: strike first at the guilty, strike hard from afar, skip the nation-building, and end wars on America’s terms. War is the use of arms to settle differences—tribal, political, religious, cultural, and material—between organized groups. It is unchanging. The general laws of armed conflict stays immutable, given the constancy of human nature. However, the manner in which war is conducted remains fluid. New weapons, tactics, and strategies elicit counterresponses in an endless cycle of tensions between defensive and offensive superiority. That said, has President Trump introduced a novel way of waging Western war against America’s foreign enemies?...