The Dutch Revolt and Spanish Power

Philip II of Spain ruled the Netherlands, seventeen provinces that were rich from trade and increasingly Protestant in the north. Heavy taxes, Spanish troops garrisoned on Dutch soil, and the Inquisition's pressure on Calvinists pushed the provinces into revolt starting in 1566. The fighting dragged on for decades, and by the time a truce arrived in 1609, the Netherlands had split: seven northern provinces, led by Holland, formed the independent Dutch Republic, Protestant and commercially booming; the southern provinces stayed Catholic and under Spanish control, becoming the Spanish Netherlands, roughly modern Belgium.

Spain had the best infantry in Europe, the tercios, but the Dutch did not need to beat them in open battle. The Netherlands sat below sea level, webbed with rivers and held dry by dikes. Rebels breached those dikes on purpose, flooding the land Spanish armies had to cross. Soldiers and siege trains bogged down in mud, supply lines broke, and towns that could flood their surroundings became nearly impossible to starve out. Geography did what Dutch arms alone could not.

Spain's failure to crush the revolt exposed a deeper weakness: money. Silver from Peru and Mexico made Spain look invincible, but paying tercios year after year in the Netherlands, plus fighting England and France, cost more than the silver brought in. Philip II defaulted on Spanish debt multiple times. The 1588 Armada, sent partly to support the Spanish Netherlands by knocking England out of the war, scattered in storms after English ships and bad coordination with Spanish land forces broke the plan apart. Spain's decline set the stage for France's rise.