In Thailand, the missions of the Royal Thai Armed Forces (RTARF) include defending the country’s territory and sovereignty, protecting the monarchy, ensuring internal security, and responding to natural disasters; key areas of emphasis are disputed international borders and a low-level insurgency in the country's south; the military has historically had a large role in domestic politics and has attempted as many as 20 coups since the fall of absolute monarchy in 1932, the most recent being in 2014

in July 2025, following months of rising tensions, the RTARF and Cambodian military forces clashed in multiple locations along their disputed border; both sides blamed the other for provoking the five-day conflict, which included cross-border artillery shelling by both sides and air attacks by RTARF fighter aircraft and drones; since 2004, the RTARF and Thai paramilitary forces have combated a separatist insurgency in the southern Thailand provinces of Pattani, Yala, and Narathiwat, as well as parts of Songkhla; the insurgency is rooted in ethnic Malay nationalist resistance to Thai rule that followed the extension of Siamese sovereignty over the Patani Sultanate in the 18th century; the insurgency consists of several armed groups, the largest of which is the Barisan Revolusi Nasional-Koordinasi (BRN-C): insurgent attacks have largely involved bombings; since 2020, Thai officials have been negotiating with BRN, and has parallel talks with an umbrella organization, MARA Pattani, that claims to represent the insurgency groups (2025)