The Galactic Civil War is a fan-created game based on Star Wars Battlefront 3.
According to the developer, you can take a vessel and fly from ground to space. You are also able to take command posts and destroy the capital ship. There is Ai for vessels but just a simple solution for ground troops.
You can start out as Rebels or Empire as well as instant action. Training and multiplayer were never implemented.
The last release was still considered beta, and there hasn't been much activity although he has shown up working on another game. We're not familiar with the genre so we got lost when trying to figure out how to play.