What happened at the Battle of Dessau in 1626?

The Battle of Dessau, fought on April 25, 1626, was a significant engagement during the Thirty Years’ War and the first major success for the newly raised imperial army under Albrecht von Wallenstein.12

The Protestant commander Ernst von Mansfeld attempted to break the imperial line at the Elbe River bridgehead near Dessau to advance into Bohemia. Despite initially holding superior numbers, Mansfeld failed to overcome Wallenstein’s fortified positions during a siege that began in mid-April.23

On the morning of April 25, after imperial reinforcements arrived, Wallenstein utilized a flanking maneuver from a nearby wood to outnumber and overwhelm the Protestant forces. Following five hours of intense fighting, the imperial army launched a decisive counterattack that forced the Protestants to retreat. The battle resulted in heavy losses for Mansfeld, including approximately 3,000 captured and 1,000 to 2,000 dead. Although Wallenstein secured a victory, he faced criticism for allowing Mansfeld to escape the battlefield.21