For quite a few years, I have been having friends and family tell me that I should try for a Master's or Doctorate Degree, given my knowledge of history, military history in particular. My wife remembers that will visiting me as we were dating, having one of the ROTC professors tell her that I should not go for a Master's Degree but go straight for a Doctorate. I was told the same thing in 2006 while teaching World Geography at a local university, and how they could not keep me as an adjunct professor without at least being in a Master's program, and where I could apply for a non-resident Doctoral Degree.
I have been looking at Norwich University's online Master's in Military History, and finally have decided to see if that might work for a starter. I am hoping that some of my earlier work might count towards a degree, but I will have to see. Nothing ventured, nothing gained.