he burnt the ships in order to force his men to fight to the end. However, the Danish force changed its mind and returned to Denmark. Styrbjörn marched alone with his Jomsvikings to Gamla Uppsala. His uncle, however, was prepared and had sent for reinforcements from all directions. During the first two days, the battle was even. The latter evening, Eric went to the statue of Odin at the Temple at Uppsala, where he made a sacrifice. He promised Odin that if he won the battle, he would belong to Odin and arrive at Valhalla ten years from then. The next day, Eric threw his spear over the enemy and said, "I sacrifice you all to Odin". Styrbjörn and his sworn men stayed and died. Eyrbyggja saga The Eyrbyggja saga has a short summary of Styrbjörn's career in connection with one of its protagonists: Hervarar saga The Hervarar saga gives an even shorter summary of Styrbjörn's story and his battle with his uncle Eric: Knýtlinga saga The Knýtlinga saga recounts that Styrbjörn was the son of the Swedish king Olaf. When Harald Bluetooth ruled Denmark, Styrbjörn was making war in the east (í hernaði í Austrveg) and then came to Denmark where he took Harald captive. Harald gave his daughter Tyra to Styrbjörn and joined him on his expedition to Sweden. On arrival, Styrbjörn set his own ships on fire, but when Harald saw that Styrbjörn no longer had any ships he sailed back out onto Lake Mälaren (Löginn) and returned to Denmark. Styrbjörn fought his uncle Eric on the Fyrisvellir and he fell together with most of his men. Some of his men fled and this the Swedes called the Fyriselta, the chase of the Fyris. Gesta Danorum The Danish chronicler Saxo Grammaticus tells a more pro-Danish version in Gesta Danorum (Book 10). According to him, Styrbjörn was the son of the Swedish king Björn. Styrbjörn had an uncle named Olaf, whose son Eric had taken the Swedish kingdom from Styrbjörn. Styrbjörn came to Harald Bluetooth, bringing his sister Gyrithe with him, and humbly asked Harald for help. Harald decided to befriend Styrbjörn and Harald offered his sister Gyrithe to be Stybjörn's wife. Harald then conquered the land of the Slavs and took the stronghold Julin (Jomsborg), which he gave to Styrbjörn to command with a strong force. Styrbjörn and his force (the Jomsvikings) dominated the seas, winning many