Nils Stensson Sture

Sten Sture ruled Sweden through the 1510s with the title of regent (Swedish: riksföreståndare), but in February 1520 he suffered a mortal wound fighting against Christian II of Denmark at the Battle of Bogesund.

Later that year, Gustav's troops marched into Dalarna to suppress the rebellion, and the Dale-Junker fled to Norway, where he was acknowledged as the legitimate son and heir of Sten Sture the Younger by the authorities, notably Olav Engelbrektsson (the Catholic Archbishop of Nidaros) and Vincent Lunge, the governor of Bergen Castle and leading member of the Norwegian Council of the Realm.

In February 1528, an army of Norwegian troops and Swedish exiles, led by Peder Gröm, invaded Sweden from Norway, but was rapidly defeated by Gustav's forces.

The traditional view, based on the official propaganda of King Gustav and the later House of Vasa, has been that Daljunkern was an impostor, a common farmhand named Jöns Hansson.

However, revisionist historians have questioned this consensus, noting that Gustav I did not actually reject Daljunkern's claim to be Nils Sture in his contemporary letters.