They are the basic fighting force of the EDF, they fought in a load of battles.
Class: Trainee
Weapon: Vector-H
Rank: 1
As a trainee you would fight alot of alien invaders, they had the largest amount of troops in their rank.

The 2nd main fighting force, fought in the battle at research facility Epsilon-98.
Class: Marine
Weapon: Famas
Rank: 2
At the raid on research facility Epsilon-98 it was completely overrun but the marines held out all on their own until reinforcements arrived.

The RCU defends the facility against riots, like the riot of Alpha-57.
Class: RCU
Weapon: Mac-10 & Riot Shield
Rank: 3
At the riot of Alpha-57 they held out until more RCU arrived.

Officers command their own private squad.
Class: Commanding
Weapon: AK-47
Rank: 4
At the attack on the facility Beta-42 an officer held out with his squad for 23 days until reinforcements arrived!

The R.O.D, or Remote Operations Department. an elite team of marines used in space to deal with interplanetary warfare.

The troops in action: