Complex sentence: However, they were betrayed by the notorious Ze Rong, who arrived Yuzhang first and usurped control of the area, a bitter battle was fought, resulting in heavy losses on Liu's side.
Split into simpler sentences: However, they were betrayed by the notorious Ze Rong, who arrived Yuzhang first and usurped control of the area. Thus, a bitter battle was fought, resulting in heavy losses on Liu's side.