M I L T E R M S : J : JULIET
JAG : Judge Advocate General
Judge Advocate General, as chief legal officer, or Judge Advocate General's Corps, a lawyer in uniform; also known as "legal beagle" or insultingly as "JAG-off" (sounds like "jack-off"; cf: POGUE) for JAG-officer.
https://www.combat.ws/S4/MILTERMS/MT-J.HTM