Sweyn Forkbeard
After the battle of Svolder, together with his brother Sveinn Hákonarson, Eric became governor of Norway under Sweyn Forkbeard from 1000 to 1012. Eric's son, Hákon Eiríksson, continued in this position until 1015. Eric and Sveinn consolidated their rule by marrying their sister Bergljót to Einarr Þambarskelfir, gaining a valuable advisor and ally.