Sverre Sigurdsson Defeats Magnus V at Fimreite

In a decisive naval battle at Fimreite, Sverre Sigurdsson, the Birkebeiner pretender, secured victory against King Magnus V of Norway. The conflict, part of a civil war for the Norwegian throne, resulted in Magnus V's death, allowing Sigurdsson to claim the throne. The battle's location along the shores of the Sognefjord played a crucial role in naval tactics and the use of longships, an essential aspect of Viking warfare.