Battle of Rocroi
The Battle of Rocroi, fought on 19 May 1643, was a major engagement of the Thirty Years' War between a French army, led by the 21-year-old Duke of Enghien (later known as the Great Condé) and Spanish forces under General Francisco de Melo only five days after the accession of Louis XIV to the throne of France after his father's death. Rocroi shattered the myth of invincibility of the Spanish Tercios, the terrifying infantry units that had dominated European battlefields for the previous 120 years. The battle is therefore often considered to mark the end of Spanish military greatness and the beginning of French hegemony in Europe during the 17th century. After Rocroi, the Spanish progressively transformed the tercio system incorporating more of the line infantry doctrine used by the French over time. Context Since 1618, the Thirty Years' War had raged in Germany, with the Catholic Austrian and Spanish Habsburgs fighting the Protestant states. In 1635, fearing a peace too favorable to the House of Habsburg after a string of Protestant defeats, France decided to intervene directly and declared war on the Habsburgs and Spain, despite France being a Catholic power that had suppressed its own Protestant rebellions. An