Complex sentence: Due to USARAK being a division sized unit, but not a division, USARAK is not authorized its own Provost Marshal; therefore, the Commander, 793rd MP Battalion is the Provost Marshal for all of US Army Alaska.
Split into simpler sentences: Due to USARAK being a Division sized unit, however not being a division, USARAK does not get their own Provost Marshal. Because of such reasons, the Commander of the 793rd is also the Provost Marshal for all of US Army Alaska.