Excerpts from Books and Wikipedia
"The cruelty and destruction inflicted by the Spanish army became known as the "Spanish Fury" and turned many against the Spanish Habsburg monarchy. . . In the 1570s, recession hit Seville's trade with the Americas, and Philip could not make regular payments to his discontented troops in the Netherlands. They decided to pay themselves by sacking Antwerp." [Furtado: 1001 Days]