The Terran Confederation military is divided into three branches: Navy (starship crew), Space Force (most of the pilots) and Marines. Officers are allowed to transfer between branches, thus explaining Christopher Blair's new rank of Commodore (before, he was a Space Force Colonel). See more
[Reading out the ancient Kilrathi prophecy
There shall come a time when one who has the heart of a Kilrathi, but is not Kilrathi born, shall rain cleansing fire down upon us, and Kn'thrak, a time of great darkness, shall embrace us.