One minor thing that may need correcting: It was Voss Parck who brought Thrawn to the Empire and later served under Thrawn, not Colonel Barris.
If I recall correctly, Barris and his men had circles ran around them by Thrawn's crazy tactics on that uninhabited planet and Barris was not exactly a fan of him, likening Thrawn to a Jawa during their first meeting because of the furs he was wearing at the time.