The Siege of Breda of 1624–25 occurred during the Eighty Years' War. The siege resulted in Breda, a Dutch fortified city, falling into the control of the Army of Flanders. Following the orders of Ambrogio Spinola, Philip IV's army laid siege to Breda in August 1624. The siege was contrary to the wishes of Philip IV. The city was heavily fortified and defended by a garrison of 7,000 men. Spinola rapidly blocked its defences and prevented a Dutch relief army under the leadership of Maurice of Nassau from blocking access to his supplies. In February 1625, a second relief force, consisting of 7,000 Englishmen under the leadership of Horace Vere and Ernst von Mansfeld, was also driven off by Spinola. After a costly eleven-month siege, Justin of Nassau surrendered Breda in June 1625. Only 3,500