So they are both fighting again over a border dispute‽

Apparently, this was never previously resolved within diplomatic negotiations.

👉🏾 #Thailand 🇹🇭 and #Cambodia 🇰🇭 are fighting again, leaving a #Trump-brokered peace agreement all but dead. What happened? https://www.cnn.com/2025/12/09/asia/thailand-cambodia-border-conflict-explainer-intl-hnk

I think the only realistic options are either to insert a powerful peacekeeping force between these two nations or to let them fight it out amongst themselves.