The Dutch rebel leader Louis of Nassau (brother of William the Silent) had failed to capture the city Groningen after the Battle of Heiligerlee, Louis is driven away by Fernando Álvarez de Toledo, Duke of Alba, and defeated at the Battle of Jemmingen (also known as Battle of Jemgum, at Jemgum in East Frisia - now part of Germany) on July 21, 1568.
