My 2c While the rules of evidence are similar, the big difference is you will be tried by a jury of officers, and if you are enlisted, at least one senior NCO. Also, unlike civilian prosecutors, the JAG will almost never go to trial unless the verdict of guilty is lock solid. The punishment limits are less severe for a Special CM (e.g., BCD vs DD, lesser fines). Only a GCM can issue a DD. There was one case study in my military law class (from the 60s when homophobia was popular) of a retired Admiral being recalled to active duty and GCMed for being caught in a flagrant act of sodomy. So, there have been other precedents.