They aren't even close. The covenant in Halo are a bunch of races, not humans like the Advent. Also slipspace can only be used by humans to jump from star system to star system, not planet to planet. Sure the covenant can but thats because of Forerunner equipment. The longsword fighter is also a stretch to compare to the fighters of the TEC. Sorry close but not really.
Vomitpox
I see them a lot, and man do they ever look cool on volcanic worlds.
Culture is used to convert other planets under hostile control to neutral so that you can take it over.
So I've been playing the game for a few days and I'm starting to get the hang of the game, but when I put together my fleets, I don't really understand the differances between two capital ships as fleet leaders. I play TEC and use a sova as my flag ship, if any of that matters.
I love pirates for only a little while vs the AI. Once I get my TEC super weapon I build two of them and take out the pirate base so that I don't have to deal with them any more. They are fun to sick on oppenents and once in awhile have them attack a different person then who they were attacking. I played against 3 computers today and had the pirates attack the same person for the better part of 3 hours until I could bring a force to bare against them.