Thailand-Cambodia Clash Draws China, U.S. Into Mediation Push

Thailand-Cambodia border clash sparks a mediation race between China and the U.S., testing ASEAN’s ability to manage regional conflict.
A Cambodian soldier rides a BM-21 rocket launcher in Oddar Meanchey on July 25, 2025. Thailand-Cambodia border clash sparks a mediation race between China and the U.S., testing ASEAN’s ability to manage regional conflict. (Tang Chhin Sothy/AFP)

A 24-hour burst of rockets and artillery on the Thailand-Cambodia border conflict has done more than kill civilians and send 100,000 people fleeing; it has set off a diplomatic sprint that pits China’s offer of “impartial” mediation against a U.S. treaty ally’s insistence on going it alone.

The latest crisis began with a landmine explosion in a disputed border area, wounding five Thai soldiers. Thai authorities accused Cambodia of laying new mines, a charge Phnom Penh denied, citing possible remnants from past conflicts.

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