Cambodia Protests Thai Trench Construction Near Boundary Pillar No. 9

The Royal Government of Cambodia lodged a formal protest after Thai armed forces reportedly used heavy machinery on September 15 to level ground and dig an earthen trench near Boundary Pillar No. 9 in the Ta Tum area of Anlong Veng district, Oddar Meanchey province. Cambodia's Ministry of Foreign Affairs and International Cooperation said the activity violated its sovereignty and territorial integrity as delimited by the 1:200,000-scale Franco-Siamese Convention maps of 1904 and the 1907 Treaty, and breached Article 5 of the June 14, 2000 MOU on Survey and Demarcation of the Land Boundary. Cambodia demanded Thailand cease the work and honor its Dec 27, 2025 GBC commitments to de-escalate and refer boundary work to the Joint Boundary Commission. Thailand had not issued a public response to this specific incident as of this update; the episode follows earlier Thai road-construction activity reported between the same pillars in mid-July 2026.