Siege of Breda (1637) when word came that the Dutch had suddenly invested the city of Breda with a besieging army of 18,000. Breda was the capital city of the baronial fief that had once been the crown jewel in the Dutch estates of the Nassau family in the Habsburg Netherlands before the war started. Frederick Henry had therefore a personal interest in recapturing the city and its surroundings. The siege was preceded by an attempt to surprise the garrison on 21 July 1637 by Dutch cavalry under Henry Casimir I of Nassau-Dietz. However, the gates were closed in time and the Dutch skirmishers
The Surrender of Breda the Eighty Years' War. The Spanish general, Genoese aristocrat Ambrogio Spinola, conquered Breda against the instructions of his superiors. Before its capture, the Spanish government had decided that siege warfare against heavily defended towns of the Low Countries was too wasteful and that they would concentrate instead on an economic blockade of the Dutch Republic. The bulk of Spanish forces were diverted to the unfolding Thirty Years War. Breda, a city near the frontier of Holland proper had been occupied in 1567 by the Duke of Alba, ten years afterwards recovered by Holach, and again seized by Haultepenne. The town