Do they get characters too? If so. 501st legion >All ground forces (minus flood) Sith/Jedi knights > Spartans (Lightsabers would destroy mljonir armor plus Jedi are insanely fast) (Example of jedi speed. Darth Bane could swing his lightsaber 16 times in a single second, and flourish it fast enough to wear rain could not touch him. Also a lightsber would melt a bullets lead instantly. Mjolnir armor is very weak against plasma. (Last I read) Flood > ground troops minus droids. Droids > Flood. Star destroyers > Covenant and Unsc ships. Death star > defense weapons. Forerunners = Powerful sithlords/jedimasters. Forerunner ships > Death star and star wars fleets. Not sure how powerful precursors are tbh. Darth Sidious can destroy entire fleets, Darth Nihilus can devour planets through the force Star Wars universe Has the following edges. Superior ground forces, and weaponry/human/aliena capable of destroying entire planets with ease. Halo has the following. Superior space weaponry due to forefunners+A galatic time bomb. Star wars wins on the ground. Forerunners win in space. Without a way to compete with forerunner ships (excluding palps) star wars loses. In best case scenario Halos are activated for a stale mate. I will admit my knowledge is a bit out dated, there is my opinion though. Halo wins. Stalemate at beat.