Imperial forces are defeated by the Swedes at the Battle of Chemnitz. The Swedish victory prolongs the Thirty Years' War and allows them to advance into Bohemia.
The Battle of Chemnitz (14 April 1639) took place near the town of Chemnitz, in what is now eastern Germany, during the Thirty Years' War. Swedish forces under Johan Banér inflicted a crushing defeat on Rodolfo Giovanni Marazzino who commanded the Saxons and an Imperial detachment.