In September 1620,  he was sent on a royal progress through Bohemia and the Upper Palatinate with a guard of 4,000 men, which ended in Leeuwarden where his kinsman Ernst Casimir, Stadtholder of Friesland, Groningen and Drenthe, took custody of him.
In September 1620, he was dispatched on a royal tour through Bohemia and the Upper Palatinate with an escort of 4,000 men, which concluded in Leeuwarden where his cousin Ernst Casimir, Stadtholder of Friesland, Groningen, and Drenthe, took custody of him.