functional titles such as "Division Commander", "Corps Commander", and similar titles. In 1924 it supplemented this system with "service categories", from K-1 (lowest) to K-14 (highest). The service categories essentially operated as ranks in disguise: they indicated the experience and qualifications of a commander. The insignia now denoted the category, not the position of a commander. However, one still had to use functional titles to address commanders, which could become as awkward as "comrade deputy head-of-staff of corps". If one did not know a commander's position, one used one of the possible positions—for example: "Regiment Commander" for K-9. On September 22, 1935, the Red Army abandoned service categories and introduced personal ranks. These ranks, however, used a unique mix of functional titles and traditional ranks. For example, the ranks included "Lieutenant" and "Komdiv" (Комдив, Division Commander). Further complications ensued from the functional and categorical ranks for political officers (e.g., "Brigade Commissar", "Army Commissar 2nd Rank"), for technical corps (e.g., "Engineer 3rd Rank", "Division Engineer"), for administrative, medical and other non-combatant branches. The year before (1934), the revival of personal ranks began with the Marshal of the Soviet Union rank bestowed upon 5 Army Commanders. There were further modifications to the system. 1937 saw the Junior Lieutenant and Junior Military Technician ranks being added. On May 7, 1940, the ranks of "General" or "Admiral" replaced the senior functional ranks of Kombrig, Komdiv, Komkor, Komandarm; the other senior functional ranks ("Division Commissar", "Division Engineer", etc.) remained unaffected. On November 2, 1940, the system underwent further modification with the abolition of functional ranks for non-commissioned officers (NCOs) and the introduction of the Podpolkovnik (Lieutenant Colonel) rank. In early 1942 all the functional ranks in technical and administrative corps became regularised ranks (e.g., "Engineer Major", "Engineer Colonel", "Captain of the Intendant Service", etc.). On October 9, 1942, the authorities abolished the system of military commissars, together with the commissar ranks. The functional ranks remained only in medical, veterinary and legislative corps. By then the Naval rank of Midshipman was revived in the Soviet Navy as an NCO rank, a role lasting until the 1970s. In early 1943 a unification of the system saw the abolition of all the remaining functional ranks. The word "officer" became officially endorsed, together with the epaulettes that superseded the previous rank insignia. The ranks and insignia of 1943 did not change much until the last days of the USSR;