The northern counties of Holland and Zeeland rebelled in 1572, when Calvinists took over control of most of the cities. The Spanish army tried to reconquer them but failed during the Siege of Leiden in 1574. In 1575 Philip II had to declare bankruptcy. As a result the Spanish soldiers did not receive any payment, and they mutinied, pillaging the countryside of Brabant and Flanders and the city of Antwerp, where 10,000 inhabitants in a city with 100,000 people were killed by the Spanish soldiers, who tried to kill all the local Protestants.