You do realize the Imperial fleet controlled the galaxy, right? It was made up of millions of ships, not including stations, fighters and superweapons. There is also the Clone Army, and the Separatists, both of which controlled thousands of systems. Also, are we including the expanded universes of the two franchises as well? Because Darth Nihilus could wipe out most of the Characters on the Halo side with a wave of his hand. Put him alongside Darths Sidious, Vitiate and Bane and they're basically unstoppable. There's also the Yuuzhan Vong to consider, as well as the Infinite Empire, the Family and the Rakghouls. Star Wars with all of its expanded lore is several times bigger, and has characters with godlike capabilities (as well as having actual gods), while Halo has a bunch of super soldiers and a few alien species. The only areas in which Halo beats Star Wars are with the Halos and the Flood. And you know what neither of those things can effectively fight? An army of non-organic enemies, i.e. The droid armies of the separatists