In June 1630, when Christina was three years old, Gustavus Adolphus left for Germany to defend Protestantism and became involved in the Thirty Years' War. He secured his daughter's right to inherit the throne, in case he never returned, and gave orders to Axel Gustafsson Banér, his marshal, that Christina should receive an education of the type normally only afforded to boys.
In June 1630, when Christina was three years old, Gustavus Adolphus left for Germany to defend Protestantism and became involved in the Thirty Years' War He secured his daughter's right to inherit the throne in case he never returned and gave orders to Axel Gustafsson Banér, his marshal, that Christina should receive an education of the type normally only afforded to boys.