Not all wars end with a signature on a battleship.
This alternate history thriller explores a post-WWII world where Reinhard Heydrich (Hitler’s most ruthless enforcer) survives and turns Germany into an underground terror network. The Man with the Iron Heart
In The Man with the Iron Heart , Harry Turtledove imagines a post-WWII where Heydrich builds a Nazi insurgency so brutal, the Allies consider letting Hitler keep power just to stop the bloodshed. Not all wars end with a signature on a battleship