Question: Heinrich Holk was a mercenary in the service of the military leader of what heritage?
Sentence (from "Heinrich Holk"): Heinrich Holk (also Holke or Henrik Holck) (April 18, 1599 in Kronborg castle, Denmark – September 9, 1633 in Troschenreuth, Vogtland) was a Danish-German mercenary in both Christian IV of Denmark's and Albrecht von Wallenstein's service during the Thirty Years' War.
Relevant evidence: Yes