Naplanum was king of Larsa from 2026 to 2006 BC, but it was Samium (1977 to 1943 BC) who established Larsa as a rival power to Isin. After a dynasty of ten more kings, Rimsin (1822 to 1763 BC) brought Larsa to its largest extent, defeating Damiq-ilishu of Isin and unifying Lower Mesopotamia.