Another of the big mysteries that encompass the next trilogy of Star Wars films, is primarily the part of warfare. Even though the story is titled ''Star Wars'' the Wars part of the title seems to be somewhat out of context when you refer to anything post-Return of the Jedi, despite what the EU shows in that time period. Once you brought balance to the Force, even if your own children have to maintain it, it kind of has to symbolize how the battles that follow will not be the same as the ones previous to it. Let me explain myself better:
When we are introduced to the beginning of the story, Star Wars Episode I: The Phantom Menace, the battles were focused on the Gungans fighting off the Trade Federation's droid army. The army was not meant to be a large one, and was mainly used to defend the shipments the federation did. The war here is similar to how in Return of the Jedi, the Ewoks face off against the Empire, in the sense that it's a group of native species to that home planet fighting off a tyrannical regime. By the time we get to Attack of the Clones, Count Dooku has managed to assemble a more powerful and much bigger droid army than the one we saw in Episode I, combining the droids assembled by a series of banks and corporations. At the same time, as part of the Sith Grand Plan, the Jedi become aware of the creation of a Clone Army assembled by the Kaminoans, which had been ordered in secret by Jedi Master Sifo-Dyas ten years earlier. Once the Republic feels in serious danger by the increasing threat of the Separatists, the Senate decides to allow for the use of this Clone Army. So, the beginning of the Clone Wars is in a sense the first full scale war we see in the saga.