Thailand's Coup Group was composed of powerful military officers who planned and carried out a coup d'état in November 1947. Their prestige and influence were quickly enhanced by Field Marshal Plaek Phibunsongkhram's return to politics. They would however outlast him and dominate Thai politics for the next two decades. Most would eventually receive high ranks, becoming generals and field marshals.
The Coup Group consisted of approximately forty junior army officers led by a small number of commanding officers, many of whom had been forced into retirement by Pridi Phanomyong at the end of the Second World War—men with little other than conspiracy to keep themselves occupied.
The coterie's leading members were Field Marshal Sarit Thanarat, commander of the Bangkok-based First Division, Police General Phao Siyanon, the powerful chief of police, Field Marshal Phin Chunhawan, Phao's father-in-law, the politically prominent Lieutenant-General Kat Katsongkhram, and Marshal of the Royal Thai Air Force Fuen Ronnaphakat, the air force's combat-experienced commander.
Less senior members included Phin's son, Chatchai Chunhawan, and Sarit's protégés Thanom Kittikachorn and Praphat Charusathian.