Border Conflict

Thailand carried out air strikes along its disputed border with Cambodia on Monday after new clashes erupted between the two Southeast Asian neighbors, marking the most serious breakdown of their U.S.-brokered ceasefire since October, according to military statements from both governments.

The renewed fighting—centered in Thailand’s Ubon Ratchathani province—comes after weeks of rising tension and mutual accusations of ceasefire violations. The escalation has already triggered mass evacuations on the Thai side and revived fears of a broader conflict along a border that has seen repeated clashes over the past century.

Thailand’s military said its forces came under fire early Monday …