Jedi and the army.

In Knights of the Old Republic, the events take place 2000 years before the first episode of the film. In reality, the Jedi were used as generals – just like in the film. But after the Mandalorian Wars, almost all the Jedi were wiped out. The Republic was slowly falling apart, but they still had regular troops and fleets. In the second Knights of the Old Republic, there is an entire act specifically about a planetary battle over Telos – and yet the army is not numerous enough, as troops from other worlds were constantly summoned for help.