5. Sonthi Boonyaratglin : Sonthi Bunyaratkalin) (2 October 1946) is former Commander-in-Chief of the Royal Thai Army and former head of the Council for National Security, the military junta that rules the kingdom. He is the first Muslim in charge of the mostly Buddhist army.. On 19 September 2006, he became the de facto head of government of Thailand after overthrowing the elected government in a coup d'état After retiring from the Army in 2007, he became Deputy Prime Minister, in charge of national security.