Astrid advocated Magnus's cause at a thing in Hangrar. A sizable force of Swedish warriors gathered under Magnus, who invaded Norway via Hälsingland in 1035. The enterprise was a great success and the pretender was hailed as king (Magnus I, Magnus the Good). Cnut the Great died in the same year and his sons lacked his capacity. When the last of them, Harthacnut, died in 1042, Magnus inherited Denmark as well. Anund Jacob's policy of maintaining a Nordic power balance can be seen in the agenda shift that followed. Anund Jacob kept Cnut's nephew Sweyn Estridsen as a protégé and supported his pretensions to the Danish throne. As related by both Snorri and Adam of Bremen, Sweyn made repeated attempts to establish his authority in Denmark, only to be defeated by King Magnus on each occasion. After every defeat, he found refuge with Anund Jacob in Sweden. Magnus died in 1047 and bequeathed Norway to his uncle Harald Hardrada, while Sweyn's right to the Danish throne was acknowledged. In spite of that, a new war flared up between Sweyn and Harald, where Anund Jacob seems to have continued supporting Sweyn. The struggle was still on when Anund Jacob died. Eastern politics The Russian Nestor Chronicle relates that the "Varyag prince" Yakun, dressed in a golden cloak, led an eastbound Swedish expedition to the other side of the Baltic Sea in 1024. He provided military reinforcements to Yaroslav I the Wise (Anund Jacob's brother in law) in a battle against Mstislav of Chernigov. The battle was fought during a thunderstorm and ended in a defeat for the allies, and Yakun went back across the sea. According to Gudmund Jöran Adlerbeth of the Swedish Academy (1802), Yakun was identical with King Anund Jacob and was blind. Alternatively, the name Yakun could correspond to someone named Håkan, unknown in the history of the era. Anund Jacob took tribute from the Baltic people called Semigallians or in Yngvars saga the Baltic Seimgalir. The tribe had refused to pay taxes to Olof Skötkonung for some time so Olof sent Anund Jacob his son and Ingvar to reestablish the tax system. With three ships, they arrived to convince the Semigallian leaders to continue to pay taxes to the Swedes, as they were the tribes in the Baltic area that refused to pay such taxes. Most Semigallian chieftains and their king now accepted paying tributes to Sweden.