He had at his disposal from 19,000 to 25,000 men, and at first gained some successes but on 27 August 1626 he was routed by Johan Tzerclaes, Count of Tilly in the Battle of Lutter. Christian had not thoroughly planned the advance against the combined forces of the Holy Roman Emperor and the Catholic League, as promises of military support from the Netherlands and England did not materialise. In the summer of 1627 both Tilly and Albrecht von Wallenstein occupied the duchies and the whole peninsula of Jutland.