In 1500, he had convinced his brother King John to conquer Dithmarschen. A great army was called from not only the duchies, but with additions from all of the Kalmar Union for which his brother briefly was king. In addition, numerous German mercenaries took part. The expedition failed miserably, however, in the Battle of Hemmingstedt, where one-third of all knights of Schleswig and Holstein lost their lives.
In 1500, he had convinced his brother King John to conquer Dithmarschen. A great army was called from not only the duchies, but with additions from all of the Kalmar Union for which his. brother briefly was king. In addition, numerous German mercenaries took part. The expedition failed miserably, however, in the Battle of Hemmingstedt, where one-third of all knights of Schleswig and Holstein lost their lives