Complex sentence: Under the new Thonburi regime, Thong Duang was appointed Phra Raja Warindra (Royal Police) and after subjugating the warlord of Pimai with his brother Maha Montri (later Maha Sura Singhanat) he was raised to Phraya Abhaya Ronarit.
Split into simpler sentences: Under the new Thonburi regime, Thong Duang was appointed Phra Raja Warindra (Royal Police). After subjugating the warlord of Pimai with his brother Maha Montri (later Maha Sura Singhanat), he was raised to Phraya Abhaya Ronarit.