Allied Scandinavian Kings Defeat Olaf Tryggvason at Svolder

In September 1000, a coalition of King Svein Forkbeard of Denmark, King Olof Skötkonung of Sweden, and Norwegian Earl Eirik Hakonarson ambushed King Olaf Tryggvason of Norway in a naval engagement at Svolder in the western Baltic Sea. Olaf, aboard his flagship Long Serpent, was outnumbered and defeated. He either fell in battle or leapt overboard; his fate remains uncertain in the saga accounts. The victory led to Norway's partition among the allied rulers for the following decade, reshaping Scandinavian political alignments during the period of Christianization.