It looks like Hun Sen, the President of Cambodia, posted these photos, including operational maps, to his Facebook page and then almost immediately deleted the picture with the maps (I can only find reposts).
This detailed thread on escalations, incidents, and events leading up to the July 24th Border clashes between 🇹🇭 and 🇰🇭 contains several previously unreported facts relating to Cambodian deployments and numerous satellite images of growing fortifications. Check it out.
Hugely useful timeline of the Thai-Cambodia border crisis. Makes pretty clear that the whole thing has been instigated by, and most often escalated by, Cambodia, notwithstanding tit-for-tat on the Thai side. Why is this crisis happening, and why now? 🧵 1/14