Asean military observers have now visited both sides of the Thai-Cambodian frontier, measuring damage and recording claims as Bangkok and Phnom Penh continue to trade allegations of ceasefire breaches following last year’s deadly clashes. In late June, a delegation from member states of the Association of Southeast Asian Nations fanned out across Thailand and Cambodia, escorted through contested ground and competing narratives. The fighting last year resulted in more than 100 military and...