The Battle of Jankau, also known as Jankov, Jankow, or Jankowitz, took place in central Bohemia on 6 March 1645, near modern Czech town of Jankov. One of the last major battles of the 1618 to 1648 Thirty Years' War, it was fought between Swedish and Imperial armies, each containing around 16,000 men. The more mobile and better led Swedes under Lennart Torstensson effectively destroyed their opponents, commanded by Melchior von Hatzfeldt. However, the devastation caused by decades of conflict meant armies now spent much of their time obtaining supplies, and the Swedes were unable to take advantage.

Johann von Götzen was a Lüneburg nobleman and Generalfeldmarschall who fought during the Thirty Years' War. He was married to Elisabeth of the Falke family, with whom he had two sons: Johann Sigismund, Count of Götzen (1622–1622) and Johann, Georg Count of Götzen (1623–1679).