From 1695 Margrave Christian Ludwig served as a general lieutenant at the Stettin garrison and commander of the Old Prussian Infantry Regiment No.7. He also acted as administrator of the secularised Prussian Principality of Halberstadt and was awarded the Order of the Black Eagle for his merits.
Her parents were Joachim Frederick, Margrave of Brandenburg and his first wife Catherine of Brandenburg-Küstrin. Christian met her on his journey in Germany in 1595 and decided to marry her. In 1596, Anne Catherine and her parents were present at his coronation, and the next year, the marriage was arranged.