The Battle of Breitenfeld (German: Schlacht bei Breitenfeld; Swedish: Slaget vid Breitenfeld) or First Battle of Breitenfeld (sometimes First Breitenfeld and in older texts Battle of Leipzig), was fought at a crossroads near Breitenfeld approximately five miles north-west of the walled city of Leipzig on September 17 (new style or Gregorian calendar), or September 7 (Julian calendar, in wide use at the time), 1631. It was the Protestants’ first major victory of the Thirty Years War.