Kinetic weapons(Rods from God) would be my personal choice.In the 1950s we had a program called Project Thor that would have developed an orbital weapon system. What was nice about the system that it was legal under the Outer Space Treaty and SALT II. But the Air Force stopped development. With the speed it travels, it will deliver the warhead. With GPS, Global Strike will hit any target anywhere.
I would like to see some enemy demonstration targets aka Hiroshima, Nagasaki. Back in the 40’s a little demonstration was in order to make our potential enemies shake in their boots. It’s way past time for a reprise of that mindset.