Complex sentence: Chao Ai Phaya was sent to Suphan Buri, the power base of the Suphannaphum House, Chao Yi Phaya was sent to Phraek Si Racha, and Chao Sam Phaya was sent to Chai Nat on the west bank of Phitsanulok.
Split into simpler sentences: Chao Ai Phaya was sent to Suphan Buri, the power base of the Suphannaphum House. And Chao Sam Phaya was sent to Chai Nat on the west bank of Phitsanulok.