Dug relics, still potent
As a tie-in with the 50-year long West Papuan rebellion post today, the below image is of rag-tag Bougainville Revolutionary Army insurgents using some heavy hardware against local Papua New Guinea Defence Force units in 1995 during that country’s decade-long civil war.
Those with a sharp eye will notice the ordnance is a Japanese Type 96 AAA/AT 25mm cannon, a variant of the Hotchkiss 25mm GP gun that hasn’t had any spare parts or ammunition manufactured since 1945.
This thing, with a latter example shown still in use by the KMT in 1950s Taiwan
Leftover from WWII, the gun was reportedly scrounged from the remains of an old Japanese position and returned to working condition, fed with ammo that was in some cases dug from the jungles and beaches of yesteryear. While antiquated and no doubt cranky, it was still heavier than what the PNGDF had in terms of armored vehicles to oppose it, which amounted to some French AMX-10P APCs and French VABs.