Also in multiple Orson Scott Card books if I remember correctly, something about wars being fought by drones in space by the time of the initial alien invasion in the prequel books that were written (I know he sucks yadda yadda I loved his books as a kid)
Literally the plot of multiple PKD books. Usually with humanity staying below ground; safe from a non-existant war.
PKD? Ah… Phillip K Dick.
There’s also the “sci-fi war porn” series, BOLO started by Keith Laumer.
Also in multiple Orson Scott Card books if I remember correctly, something about wars being fought by drones in space by the time of the initial alien invasion in the prequel books that were written (I know he sucks yadda yadda I loved his books as a kid)