The player is in need of GM counselling...ie you'd better talk to him and explain to him that he's spoiling the game. If he's a Trekkie then it shouldn't really be a problem. Then give him another chance to see if he can conform to the spirit of Trek. If he doesn't you may have to get heavy handed on have him investigated by JAG and then conduct a board of inquiry into his fitness to command. That should shake him up.
IMHO I think a player like the one you've described is not cut out for command and should be replaced and he should consider playing something else, someone who doesn't have to take the lead. Being CO is a very difficult role and few play it well and you notice that it usually rotates between the same players, the leaders of the group.
Arise, arise, Riders of Theoden!
Fell deed awake: fire and slaughter!
Spear shall be shaken, shields be splintered,
a sword-day, a red-day, ere the sun rises!
Ride now, ride now! Ride to Gondor!
Theoden King: The Return of the King