Same mod, different name, The Galactic Empire, the Rebel Alliance, the Black Sun Pirates, and the Droid Empire, fight for control of the galaxy.
Problem fixed. Replaced Squadrons.xml and Uniqueunits.xml with new ones and transferred all changes to the new files. I think it was because I removed a lot of units like the V-wing and others from files, although I didn't see anything that caused this problem in the first.
For some reason that I haven't figured out yet, the ships that appear in the main menu battle look like they lost weapons and break-off parts at the beginning of the battle. The ships look completly fine and intact in other parts of the game. No going to worry about this since it only affects the main menu battle.
IT WORKS