User blog comment:Kal Skirata13/Star Wars-The Grand Army of the Republic/@comment-36779962-20181231004540

I just want to point out that the Phase Ones were initially color-coded by their ranks: With yellow being used by Commanders (who run corps to battalions), red for Majors and Captains, blue is for the lieutenants, and green is for sergeant-majors and regular sergeants.