Following the conclusion of the Thirty Years' War (1618–1648) Treaty of Westphalia in 1648, and as France finally overcame its rebellious "princes of the blood" and Protestant Huguenots, the long fought wars of the Fronde (civil wars) finally came to an end. At the same time Spain's power was severely weakened by decades of wars and rebellions – and France, began to take on a more assertive role under King Louis XIV of France with an expansionist policy both in Europe and across the globe. English foreign policy was now directed towards preventing France gaining supremacy on the continent and creating a universal monarchy. To the French, England was an isolated and piratical nation heavily reliant on naval power, and particularly privateers, which they referred to as Perfidious Albion.