the opening chapter where they are bounding over a technologically inferior civilization and absolutely leveling everything with flame throwers and tactical nukes

I remember it devoting as much time to like an explanation of how making the nukes have a time delay and a speaker system that counts down in the native language was a genius strategic idea that made them way more effective as terror weapons since it meant their victims had time to be scared and knew what was about to happen, as it did to the actual action happening.

So much of the work is just Heinlein opining about the most galaxy brain shit, like the kind of stuff you’d expect from a kid raised on fashy anime except coming from an adult nerd in the 1950s.