The Battle of Lützen, fought on 6 November 1632, is considered one of the most important battles of the Thirty Years' War. Led by the Swedish king Gustavus Adolphus, an Allied army primarily composed of troops from Sweden, Saxony, and Hesse-Kassel, narrowly defeated an Imperial force under Albrecht von Wallenstein. Both sides suffered heavy casualties, with Gustavus himself among the dead.

Gustavus Adolphus, also known in English as Gustav II Adolf or Gustav II Adolph, was King of Sweden from 1611 to 1632, and is credited with the rise of Sweden as a great European power. During his reign, Sweden became one of the primary military forces in Europe during the Thirty Years' War, helping to determine the political and religious balance of power in Europe. He was formally and posthumously given the name Gustavus Adolphus the Great by the Riksdag of the Estates in 1634.