THIS is a damn good story of time travel and war and people's choices - go read it!
Espie Droger Dreams of War - Matthew Kressel
https://www.lightspeedmagazine.com/fiction/espie-droger-dreams-of-war/
> Espie Droger dreams of war. What else can he dream of? There is nothing left. He has dreamed of world travel and expensive Scotch and lithe young women and sudden uncontrollable laughter. But his vitality has seeped from him like fluid from a dying tree. Espie is old. And Espie is tired.

Espie Droger Dreams of War - Lightspeed Magazine
Espie Droger dreams of war. What else can he dream of? There is nothing left. He has dreamed of world travel and expensive Scotch and lithe young women and sudden uncontrollable laughter. But his vitality has seeped from him like fluid from a dying tree. Espie is old. And Espie is tired.