During the 16th and 17th centuries,
Habsburg Spain (1516-1700) saw a steady growth in its military power. The
Italian Wars (1494–1559) resulted in an ultimate Spanish victory and hegemony in southern Italy and in the Duchy of Milan by expelling the French. During the war, the Spanish army transformed its organization and tactics, evolving from a primarily pike and halberd wielding force into some of the first
pike and shot formation of
arquebusiers and
pikemen, known as the colunella. During the 16th century this formation evolved into the
tercio infantry formation. The new formation and battle tactics were developed because of Spain's inability to field sufficient cavalry forces to face the heavy French cavalry. Spain's army would enjoy over a century of land supremacy in Europe, with the tercios earning a feared reputation amongst all opposing armies. Habsburg Spain came to enjoy an axis of allied and neutral territories from
Naples through
Milan and northwards to the
Netherlands, a route for reinforcements that came to be called the
Spanish Road. Backed by the financial resources drawn from the Americas, Spain could afford to mount lengthy campaigns against her enemies, such as the long running
Dutch revolt (1568–1609), defending Christian Europe from Ottoman raids and invasions, supporting the Catholic cause in the
French civil wars and fighting, England during the
Anglo-Spanish War (1585–1604). By one modern estimate, the Spanish army in 1625 was 230,000 regulars (80,000 in field armies, 150,000 in garrisons), exclusive of naval personnel and militia. By another the Spanish army grew in size from around 20,000 in the 1470s, to around 300,000 by the 1630s during the
Thirty Years' War that tore Europe apart, requiring the recruitment of soldiers from across Europe. King
Philip IV himself stated in 1626: "Last year, 1625, we had nearly 300,000 infantry and cavalry in our pay, and over 500,000 men of the militia under arms, whilst the fortresses of Spain are being put into a thorough state of defence. The fleet rose at one time in 1625 to 108 ships of war at sea, without counting the vessels at Flanders, and the crews are the most skillful mariners this realm ever possessed. This very year of 1626 we have had two royal armies in Flanders and one in the Palatinate, and yet all the power of France, England, Sweden, Venice, Savoy, Denmark, Holland, Brandenburg, Saxony, and Weimar could not save them from our victorious arms." With such numbers involved, Spain had trouble funding the war efforts on so many fronts. The non-payment of troops led to many
mutinies and events such as the
Sack of Antwerp (1576), when unpaid
tercio units looted the Dutch city. Spain's holdings in Italy and the Low Countries contributed large amounts of men and treasure to the empire's army: each province was allotted a number of troops it had to pay for (including the ethnic Spanish garrisons) and recruits it had to provide. Troops were generally sent outside of the areas they were recruited in. From 1635 to 1659, the Duchy of Milan provided 100,000 soldiers to the Spanish army, while the Kingdom of Naples provided 53,500 (plus a naval expedition) from 1631 to 1636 alone. In the east, Habsburg Spain fought alongside other Christian allies against the
Ottoman Empire, taking part in numerous actions and campaigns in and around the Mediterranean over the period. The naval competition culminated in victory for the Christian alliance at the
battle of Lepanto in 1571, the last naval battle in the Mediterranean to see the large scale use of
galleys by both sides. In the middle of the century, Spain developed the
galleon for naval warfare, using them in convoys to link her possessions in the
Philippines, the Americas and Europe. The
Manila galleons sailed once or twice per year across the Pacific Ocean, whilst the
Spanish treasure fleets linked Mexico back to Europe. Spain fought the
Castilian War against the
Bruneian Empire. Spanish forces attempted to conquer Cambodia in the
Cambodian–Spanish War but were defeated. The Moros fought against the Spanish invasion for centuries in the
Spanish–Moro conflict. The
Igorot people resisted and fought against the Spanish. The Thirty Years' War (1618–1648) drew in Spain alongside most other European states. Spain entered the conflict with a strong position, but the ongoing fighting gradually eroded her advantages; first Dutch, then Swedish innovations had made the
tercio faced more competition, having to go up against increasing
firepower from its Protestant counterparts. Nevertheless, Spanish armies continued to win major battles and sieges throughout this period across large swathes of Europe. French entry into the war in 1635 put additional pressure on Spain, with the French victory at the
Battle of Rocroi in 1643 being a major boost for the French, though it proved far from decisive in the long-running
Franco-Spanish War (1635–1659). By the signing of the
Peace of Westphalia in 1648, which brought an end to most of the fighting, Spain was clearly exhausted. Politics too had begun to count against Spain. While Spain was fighting France, Portugalwhich had been under personal union with Spain for 60 years – acclaimed
John IV of Braganza as king in 1640. Spain was forced to accept the independence of the
Dutch Republic in 1648, another sign of diminishing power. In the second half of the century, a much reduced and increasingly neglected Spanish army became infamous for being poorly equipped and rarely paid. For the remainder of the century, France continued to grow in relative power under
Louis XIV. The Franco-Spanish War (1635–59) ended in defeat. However, despite some Spanish concessions (
Roussillon and
French Flanders); the Spanish maintained their main territorial holdings in the Low Countries and Italy. The
War of Devolution (1667–68) proved a one sided affair, as French forces overcame badly neglected Spanish forces and fortifications, marking the military ascendancy of France. The outcome of the
War of the Reunions (1683–1683) had a similar outcome. During the
Nine Years' War, Spain also lost Catalonia to France but it was restored to the kingdom in 1697 with the
treaty of Ryswick. ==European rivalry in the 18th century==