Hmmmm...
Maybe the bad guys named themselves the Ghost Ops (we could just refer to them as the Ghosts)? Because they're stealthy and silent and undefeatable (or so they think).
And the good guys can be the... uh... Knight's Brigade, because they fight for what's honest and true and right. -shot- (We would refer to them in the roleplay just as the Knights. Like, 'Welcome to the Knights, son. Glad you could join us.)