This picture was taken in Aceh Province of Sumatra back in 2003. I was part of a Cessation of Hostilities Monitoring Team and we had just created 'Peace Zones' - in part, these were designated geographic areas where the Indonesian Police/Military & Rebel Forces had agreed not to be armed. It was at a Peace Zone rally that this picture was taken....well, if you don't have a gun...what else do you use a holster for!?
Caveat: Not strictly military...this was an Indonesian Police Officer, but they were very much acting as a paramilitary force in the Aceh at that time (so, hope you will forgive me).