Complex sentence: Named after the legendary country of Suwannaphum, which according to Thai tradition was located in the Chao Phraya plain, it was the seat of a small Lao mandala kingdom until the Laotian Rebellion of 1826-1829 ended vestiges of Lao independence west of the Mekong.
Split into simpler sentences: Named after the legendary country of Suwannaphum, which according to Thai tradition was on the Chao Phraya plain. It was the seat of a small Lao mandala kingdom until the Laotian Rebellion of 1826-1829 ended vestiges of Lao independence west of the Mekong.