Camp Kataskinono (Location)
A Roman outpost in Giza.
The treasure is in the largest, central tent. Note the line of bushes leading directly to it.
Use those bushes to assassinate the gate guard, then approach the tent's backflap.
Slip inside, and loot the chest.
Slip back outside, and use those same bushes to whistlekill the captain over to his death. This completes the location.
There is a prisoner to be freed here, but the lack of a blue diamond indicates a hostile.