Accompanied by a renewed Counter-Reformation, this threatened Protestant states within the Empire. It also drew in external powers who held Imperial territories; Nassau-Dillenburg was a hereditary possession of the Dutch Prince of Orange, while Christian IV of Denmark was also Duke of Holstein. With France facing Spanish-financed Huguenot rebellions from 1622 to 1630, and proxy wars in Italy from 1628 to 1631, this provided opportunities to weaken the Habsburgs, but avoid direct conflict.