The fall of Antwerp on 17 August 1585 took place during the Eighty Years' War, after a siege lasting over a year from July 1584 until August 1585. The city of Antwerp was the focal point of the Protestant-dominated Dutch Revolt, but was forced to surrender to the Spanish forces under the command of Alessandro Farnese. Under the terms agreed, all the Protestants of Antwerp were given four years to settle their affairs and leave the city. Many migrated north, especially to Amsterdam. Apart from losing a high proportion of its middle class and mercantile population, Antwerp's trade suffered for two centuries afterwards as Dutch forts blockaded the River Scheldt until 1795.