 In 1502, Maximilian's son Philip the Handsome renewed the war with Charles II in order to recover Guelders, but Charles boldly waged war to defend and expand Guelderian power across the eastern and northern Netherlands during the next 36 years.Intermittently seizing control of Oversticht (modern Overijssel and Drenthe) and Nedersticht (modern Utrecht province) of the Prince-Bishopric of Utrecht, the city of Groningen and its Ommelanden and most of Frisia (modern Friesland), and carrying out raids across Holland and Brabant, Charles II came close to establishing an independent kingdom.When Philip's son Charles V became Holy Roman Emperor in 1519, this decidedly shifted the balance of power in Habsburg's favour; he only had to properly manage his personnel, troops, and resources, but that proved to be difficult as he had to manage all of Europe and the Spanish colonies.