here that military or militaristic sf is a theme common to Robert Heinlein, Poul Anderson and SM Stirling so what are some examples?
Heinlein: Starship Troopers ("To the everlasting glory of the infantry...").
Anderson: many land, sea, air and space battles, several of them summarized on this blog.
Stirling: the climax of Conquistador. Our heroes sabotage an invasion force but not before several of its transport planes have taken off so the fight must be taken to the air. The Gate is destroyed in the fighting. Will New Virginia be cut off from Firstside? We already knew that a theoretical physicist was investigating how to build a new Gate. But will the new Gate lead to the old world? There is a multiverse out there...