 Complete the following phrase:  He was born on 20 April 1911 at Sing Buri Province into an cadet branch of Chakri Dynasty with Chinese ancestry. The son of Brigadier General Prince Khamrob and his wife Daeng Bunnag, his older brother was M.R. Seni Pramoj while his great-grandmother, Ampha, was of Chinese descent and was a consort of Rama II. He served as a corporal during the 