also here is a list of the races in Halo from least to greatest.
-Current humanity ( our timeline humanity) - they built the pillar of autumn - could easily make a crater kilometers wide with a single mac cannon, also they have a few bombs capable of destabilizing ( almost completely destroying) a small moon
edit: The Pillar of Autumm is not the ship capable of creating said multi kilometer-wide crater, the UNSC Infinity is. in terms of firepower, the Autumn can probably make like a half-kilometer explosion.
-The covenant - capable of bombarding every square meter of a planet's surface, making it inhabitable. in comparsion to Current humanity, could also blow up moons and/or planets
-Ancient Humanity - same type of technology concepts as the covenant, except more advanced- (let your imagination flow in terms of destruction power by comparison)
-Forerunners - they can literally create planets, consume universes for power, and completely atomize entire body's of mass in terms of destructive power
-Precursers ( their ships were literally invulnerable until the halos fired, destroying their biological core , causing them to disintegrate) in terms of destructive power.. literally everything. think of being atomized across the entire space and time continuum, not only is the target atomized, but scattered across dimensions, universes, quantum foam, and space and time ( [i]you are forever lost in the dark corners of time[/i] )
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In star wars idk order but you have these; The mandalorians ---> a small empire of a few thousand systems The vong----> dominant species of an entire galaxy with tech of organic and seemingly dark magic origin and force sensitive The jedi---> need no explination The sith---> also no exp needed The bounty hunter's guild---> mercs from a crossed the galaxy each with their own tech The Hutt crime syndicate---> conglomerate of smugglers, pirates, slavers, traders, merchants under control of the hutt clan The wookies---> home world kashyyyk, each as powerful as a jedi regarding strength and intelligence, live extremely long lives The mon calamari---> ocean world ppl, build the best starships in the galaxy regarding frigate to cruiser class The trade federation---> largest droid army and resource pool in the galaxy thanks to the aid of the commerce guild and banking clans The nightsisters---> force sensitive witches who can tame and ride rancors amongst other abilities The ancients from the sith culture---> alot of the EU stuff gets mixed up here; vujn an korriban are key worlds to it, the ancient korriban warriors were EACH 10x as fierce as Darth Vader and vader on the battlefield was nigh invincible. Naboo: hub of artisans and amazing and sleek tech Corellia: major starship and weapons producer An there are a TON more but these are some of the KEY factions. Also JUST from mostly the new ERA (not old republic) and the lore around that, tho some is from the old republic like the vong ect...