The latest news and top stories on Thai army. A prominent Bangkok based governmental body, the Royal Thai Army is the land warfare service branch of the Royal Thai Armed Forces. Its primary mission involves defending the Thai monarchy, maintaining national security and public order, and protecting sovereignty. Headquartered on Ratchadamnoen Avenue, Bangkok, the army’s main activities include ground warfare, disaster relief, humanitarian aid, community development and international peacekeeping operations. The oldest and largest branch of Thailand’s armed forces, it has significantly contributed to national development and participated in various global conflicts and UN missions.