I noticed that the chief commandants of Kamchatka seemed to serve terms of about five years (Koselev 1802-1807, Petrovskii 1807-1813, Rudakov 1813-1817). These seem to have been Majors-General (rank IV). I want to know if the terms of other military officers were similar.
Lots of sources describe the army recruitment to decades of total service, but I haven't found anything on the appointments during officers' careers. A few years earlier, Catherine the Great established a rule that civil servants would get automatic promotions every seven years.
Were Imperial army officers' appointments all five years long?