Unit listing for the UN's remnants...

Infantry:
General Issue - infantry armed with SMG
Minigunner - infantry armed with Vulcan. Anti-armor and Anti-air.
Sniper - best range for infantry. Can build a UAV.

Javelin Trooper - uncrushable. Can be deployed for longer range in exchange for mobility.
Shock Trooper - armed with lightning gun. Can be deployed to emit EMP field. Jet Gunner - infantry with a jetpack and a gun.
Jet Launcher - infantry with a jetpack and rocket launchers. Very majestic.
Grenadier - cannon-fodder. Throws grenades. Can hijack vehicles, can sabotage buildings.
Engineer - support infantry. Can capture buildings, Can Build sentry guns, Repair and Relief Nodes and, Demo traps.

COMBAT VEHICLE:
M1 Abrams? - Main Battle Tank
Land Assault Vehicle - Light Troop Transport. Has Grenade Launcher.
Phalanx Tank - Tank with a Phalanx CIWS.
M6 Shu - Heavy Tank, has two extra turrets, has fireports.
M81 Mobile Howitzer - Heavy Artillery, mobile bunker.

Arty Barrage Tank - Tank capable of doing a continuous barrage.
Hover Siege Tank - Undeployed, has anti-infantry gun. Deployed, has powerful cannon. Amphibious.

Hover Assault Transport - Amphibious mobile bunker.

Harbinger - Heavy Tank armed with Plasma weapons.
Plasma Tank - Heavy Artillery with a really strong plasma-based weapon.

Defense Node - Heavy Support Vehicle. Rocket Artillery. Can build defense structures, Can build Barracks and War Factory. Only available via support power.

Land Commander - Battleship on wheels. Can paradrop Combat Dozers.

Infantry Communications Relay - A large vehicle with anti-personnel and anti-air gun. Mobile Barracks and Bunker.

AIR UNITS:
Dogfighter - Aircraft with very powerful machinegun. Has anti-building missile.
Carpet Bomber - does exactly what it says on the tin.
Gunship - Heavy armored aircraft with Howitzers and Machineguns.
Seahorse - VTOL aircraft armed with plasma weapons.
Hind? - Assault Helicopter

Jamadhar - Heavy Assault Helicopter.
Laser Burst Drone - can shoot powerful continuous laser beam. Requires Power to maintain beam.
Aerial Fortress "TerraSalva" - VERY LARGE AERIAL FORTRESS. HAS BATTLESHIP GUNS.