The Sith Order

Dark Lord: Dark Lord. Sarung (Kai)
Sith Lord: Lord Wolf (Cody)
Sith Master:
Sith Marauder: Darth Atzú (Mason)
Sith:
Sith Apprentice: Washington

Ranks are earned through jedi scum that you kill in a duel each rank is given by the Dark Lord.
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Stormtroopers

Commander:
Lt. Commander:
1lt:
2lt:
Sgt:
Cpl:
Pvt:

Ranks are earned through the same way just the general kills you get on the republic dogs and promotions are assigned by the commander
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Imperial Officers

Grand Moff:
Moff:
Grand Admiral:
Admiral:
Commodore:
Captain:
Commander:
Lieutenant:
Sub-Lieutenant:
Ensign: