Forum:KB:New Republic Ranks

I was wondering about the ranking system the New Republic uses, because in the X-wing series most of the Rogues finally get there much needed promotions, including Janson to major, Tycho to colonel, and Corran to captian. I was looking on the wiki and everything I find puts captain above commander, yet Wedge lead the squadron. Also I didnt see major or colonel there at all. Do starfighters use a separate ranking system? If so, help would be appreciated.