Ivar II the Younger was the son or nephew of Sitric Ivarsson [Sitric I]. Ivar assumed the throne of Dublin after Sitric was assassinated by his own men in 896. In 902 Flann Sianna with the King of Leinster and the King of Brega launched a two-pronged attack on Dublin from the north and the south, and drove Ivar II out of the city. The Norsemen’s defeat was comprehensive. They fled, leaving “great numbers of their ships behind them, and escaped half-dead across the sea.” Some of the ousted Norsemen fled to Wales, others are said to have fled to the Loire valley in France. Ivar II fled to Scotland, where he was killed in 904 by Constantine II.