Territorial unity under the French crown was attained through the recovery of feudal appanages (alienated to cadet branches of the royal dynasty) and, as in Spain, through marriage alliances. Brittany was regained in this way, although the first of the three Valois marriages with Breton heiresses also set in train the dynastic rivalry of Valois and Habsburg. When Charles VIII of France married Anne of Brittany, he stole the bride of the Austrian archduke and future emperor Maximilian I and also broke his own engagement to Margaret of Austria, Maximilian’s daughter by Mary of Burgundy. Margaret’s brother Philip, however, married Joan, heiress of Castile and Aragon, so that their son eventually inherited not only Habsburg Germany and the Burgundian Netherlands but also Spain, Spanish Italy, and America. The dominions of Charles V thus encircled France and incorporated the wealth of Spain overseas. Even after the division of this vast inheritance between his son, Philip II of Spain, and his brother, the emperor Ferdinand I, the conflict between the Habsburgs and the French crown dominated the diplomacy of Europe for more than a century.
The principal dynastic conflict of the age was less unequal than it seemed, for the greater resources of Charles V were offset by their cumbrous disunity and by local independence. In the Low Countries he was able to complete the Seventeen Provinces by new acquisitions, but, although the coordinating machinery of the Burgundian dukes remained in formal existence, Charles’s regents were obliged to respect local privileges and to act through constitutional forms. In Germany, where his grandfather Maximilian I had unsuccessfully tried to reform the constitution of the Holy Roman Empire, Charles V could do little to overcome the independence of the lay and ecclesiastical princes, the imperial knights, and the free cities. The revolts of the knights (1522) and the peasantry (1525), together with the political disaggregation imposed by the Reformation, rendered the empire a source of weakness. Even in Spain, where the rebellion of the comuneros took place in 1520–21, his authority was sometimes flouted. His allies, England and the papacy, at times supported France to procure their own profit. France, for its part, possessed the advantages of internal lines of communication and a relatively compact territory, while its alliance with the Ottoman Empire maintained pressure on the Habsburg defenses in southeast Europe and the Mediterranean. Francis I, however, like his predecessors Charles VIII and Louis XII, made the strategic error of wasting his strength in Italy, where the major campaigns were fought in the first half of the century. Only under Henry II was it appreciated that the most suitable area for French expansion lay toward the Rhine. Turkey and eastern Europe
A contemporary who rivaled the power and prestige of Francis I and Charles V was the ruler of the Ottoman Empire, the sultan Süleyman I the Magnificent (1520–66). With their infantry corps d’élite (the Janissaries), their artillery, and their cavalry, or sipahis, the Ottomans were the foremost military power in Europe, and it was fortunate for their Christian adversaries that Eastern preoccupations prevented them from taking full advantage of Western disunity. A counterpoise was provided by the rise of the powerful military order of the Ṣafavids in Persia—hostile to the orthodox Ottomans through their acceptance of the heretical Islamic cult of the Shīʿites. Ottoman strength was further dissipated by the need to enforce the allegiance of Turkmen begs in Anatolia and of the chieftains of the Caucasus and Kurdistan and to maintain the conquest of the sultanate of Syria and Egypt by Süleyman’s predecessor, Selim I. Süleyman himself overran Iraq and even challenged Portuguese dominion of the Indian Ocean from his bases in Suez and Basra. The Crimean Tatars acknowledged his suzerainty, as did the corsair powers of Algiers, Tunis, and Tripoli. His armies conquered Hungary in 1526 and threatened Vienna in 1529. With the expansion of his authority along the North African coast and the Adriatic littoral, it seemed for a time as if the Mediterranean, like the Black Sea and the Aegean, might become an Ottoman lake.
Though it observed the forms of an Islamic legal code, Turkish rule was an unlimited despotism, suffering from none of the financial and constitutional weaknesses of Western states. With its disciplined standing army and its tributary populations, the Ottoman Empire feared no internal threat except during the periods of disputed succession, which continued to occur despite a law empowering the reigning sultan to put to death collateral heirs. It was not unusual for the sultan to content himself with the overlordship of frontier provinces. Moldavia and Walachia were for a time held in this fashion, and in Transylvania the vaivode John Zápolya gladly accepted Süleyman as his master in return for support against Ferdinand of Austria.
Despite the expeditions of Charles V against Algiers and Tunis, and the inspired resistance of Venice and Genoa in the war of 1537–40, the Ottomans retained the initiative in the Mediterranean until several years after the death of Süleyman. The Knights of St. John were driven from Rhodes and Tripoli and barely succeeded in retaining Malta. Even after Spain, the papacy, Venice, and Genoa had crushed the Turkish armament in 1571 in the Battle of Lepanto, the Ottomans took Cyprus and recovered Tunis from the garrison installed by the allied commander, Don John of Austria. North Africa remained an outpost of Islam and its corsairs continued to harry Christian shipping, but the Ottoman Empire did not again threaten Europe by land and sea until late in the 17th century.
Poland, Lithuania, Bohemia, and Hungary were all loosely associated at the close of the 15th century under rulers of the Jagiellon dynasty. In 1569, three years before the death of the last Jagiellon king of Lithuania-Poland, these two countries merged their separate institutions by the Union of Lublin. Thereafter the Polish nobility and the Roman Catholic faith dominated the Orthodox lands of Lithuania and held the frontiers against Muscovy, the Cossacks, and the Tatars. Bohemia and the vestiges of independent Hungary were regained by the Habsburgs as a result of dynastic marriages, which the emperor Maximilian I planned as successfully in the east as he did in the west. When Louis II of Hungary died fighting the Ottomans at Mohács in 1526, Archduke Ferdinand of Austria obtained both crowns and endeavoured to affirm the hereditary authority of his dynasty against aristocratic insistence on the principle of election. In 1619, Habsburg claims in Bohemia became the ostensible cause of the Thirty Years’ War, when the Diet of Prague momentarily succeeded in deposing Ferdinand II.
In the 16th century, eastern Europe displayed the opposite tendency to the advance of princely absolutism in the West. West of the Carpathians and in the lands drained by the Vistula and the Dnestr, the landowning class achieved a political independence that weakened the power of monarchy. The towns entered a period of decline, and the propertied class, though divided by rivalry between the magnates and the lesser gentry, everywhere reduced their peasantry to servitude. In Poland and Bohemia the peasants were reduced to serfdom in 1493 and 1497, respectively, and in free Hungary the last peasant rights were suppressed after the rising of 1514. The gentry, or szlachta, controlled Polish policy in the Sejm (parliament), and, when the first Vasa king, Sigismund III, tried to reassert the authority of the crown after his election in 1587, the opportunity had passed. Yet, despite the anarchic quality of Polish politics, the aristocracy maintained and even extended the boundaries of the state. In 1525 they compelled the submission of the secularized Teutonic Order in East Prussia, resisted the pressure of Muscovy, and pressed to the southeast, where communications with the Black Sea had been closed by the Ottomans and their tributaries.