Basic Remnant Infantry: In a nod to the Remnant's combination of adaptability and opportunistic tendencies, their basic infantry unit wields a modified version of the M-16 rifle once used by modern military forces but now enhanced to fire heavier-hitting rounds while allowing a slightly faster rate-of-fire. Consider these the Remnant army's version of those poor bastards who wore red shirts on the original Star Trek - fairly disposable but good for soaking up damage.
Hunter: Take a super smart, determined Remnant infantry unit and give him access to some extremely sophisticated hacking equipment. Then, set him loose on the battlefield to subvert high-tech enemy units to the Remnant cause. If that doesn't cut it for ya, give him the ability to jack into organic units as well, and then you can call it a day.
Marauder: These advanced soldiers carry the equivalent of a machine gun on steroids. This souped-up automatic weapon spits death nearly twice as fast as a normal MG, but doesn't get nearly as overheated. Marauders are the kind of guys you don't really want crashing your party (unless they're bringing the chips).
Bullseye: If the Marauders (see above) are the guys you don't want at your party, the Bullseye units are the guys who get all the chicks. They strut their stuff behind the scope of a very precise, very long-range sniper rifle. However, behind their backs they're known as the guys who "don't like to get their hands dirty."
Above: The Remnants' Valkyries seem to have the upper hand on that mech (pun)
Firebug: Someone in Remnant R&D decided that if a chain gun was fun, a flame-throwing chain-gun capable of dispersing six separate streams of fire would be twice as fun. We suspect that they're right. The Firebug is best suited for crowd control and as an anti-infantry unit.
Jackhammer: This mobile weapons platform slaps a set of high-powered cannons onto a truck chassis to provide a hard-hitting, fast-striking vehicle. If you thought calling "shotgun" was tough in the past, this little puppy makes it even harder to get that precious passenger seat - but if you nab it, watch out!
Paladin: Unlike its noble namesake, the Paladin is more of a cowardly weapon for long-range artillery bombardments. In keeping with Remnant doctrine, however, it's extremely versatile - capable of firing not only standard explosives but more specialized fire and cluster shells as well. Fire ordinance fries large segments of ground into a baked wasteland while cluster shells separate in mid-air to provide that crispy carpet-bombing effect.
Rocket Storm: You say that you can't even afford a modern Hummer? What about a slightly more futuristic humvee sporting rocket-launching pods that are programmed to hone in on specific Ascension shield frequencies? I'll even knock a $1000 off the price and throw in a spare set of tires…
Valkyrie: Some consider the Valkyrie to be the great grandchild of the UH-1 Huey combat helicopter. But I wonder what its grandpa would think of its ability to target both air and ground units with its rotating rocket-pods. Of course, he'd be so proud.