Posted by: PLUT0NIUM 235
gotta be terrans for me, for a number of reasons, firstly their standard 'grunt' is much more powerful than a UNSC marine, even ODST would match terran marines, hell terran marines have very rapid fire gauss rifles as their standard gun, which can fire depleted uranium armour penetrating rounds. also terran armour is fully pressurised and looks as though it could take couple of hits before being penetrated, especially by things like assault rifle.
terrans have ghosts, cloaking special operations soldiers, which have 25mm HE sniper rifles, which can fire an 'lockdown' round capable of frying electronics with EMP. goliaths, bi-pedal mechanoids, two 30mm HE autocannons with good rate of fire (should chew up marines, ODST and warthogs with no trouble) and decent battery of anti-aircraft missiles. they have the thor, which is a bi-pedal siege machine, two large particle cannons, a battery of 330mm barrage cannons for indirect fire support and anti-aircraft missiles. don't understand how the UNSC would combat, especially goliaths and thors, backed by terran marines with combat shields and depleted uranium rounds.
aircraft, wraith superiority fighters with cloaking devices, small and single seated, not much bigger than banshee yet capable of atmospheric/space flight. valkyrie frigates for fire support, with their 'halo' anti-aircraft missiles. banshees are VTOL like hornet (just cooler, sorry halo!) with cloaking device and missile pods, also have boosters for getting places quick. vikings are bi-pedal transformer style vehicles which are aircraft that can transform into walkers, they have gatling guns as well as missiles.
in space terrans have wraiths, valkyries and battlecruisers, battlecruisers are large (though not as large as UNSC cruisers i don't think), are littered with laser batteries, have huge main cannon on the front (yamato gun) and are shielded, plus they can operate in-atmosphere to provide support to ground forces, they also have numerous point defence guns, missile launchers, act as carriers for wraiths and have torpedoes for ground attack (removed from final SC:II). don't understand where the UNSC have the advantage to be honest...!
From what you've said, the Terrans would win the ground war. However, SMACs can shred covenant cruisers which are much larger than Terran battle cruisers and have stronger shields and NOVA bomb can destroy entire planets so the UNSC wins the space fight
[Edited on 12.13.2010 5:48 PM PST]