Before another 100 years had elapsed, Poland-Lithuania had virtually ceased to function as a coherent and genuinely independent state. The commonwealth's last martial triumph occurred in 1683 when King Jan Sobieski drove the Turks from the gates of Vienna with a cavalry charge. Poland's important role in aiding the European alliance to roll back the Ottoman Empire was rewarded with territory in western Ukraine by the Treaty of Karlowicz (1699). Nonetheless, this isolated success did little to mask the internal weakness and paralysis of the PolishLithuanian political system. For the next quarter century, Poland was often a pawn in Russia's campaigns against other powers. Augustus II of Saxony (1697-1733), who succeeded Jan Sobieski, involved Poland in Peter the Great's war with Sweden, incurring another round of invasion and devastation by the Swedes between 1704 and 1710.

In the eighteenth century, the powers of the monarchy and the central administration became purely trivial. Kings were denied permission to provide for the elementary requirements of defense and finance, and aristocratic clans made treaties directly with foreign sovereigns. Attempts at reform were stymied by the determination of the szlachta to preserve their "golden freedoms" as well as the rule of unanimity in the Sejm, where any deputy could exercise his veto right to disrupt the parliament and nullify its work. Because of the chaos sown by the veto provision, under Augustus III (1733-63) only one of thirteen Sejm sessions ran to an orderly adjournment.

Unlike Spain and Sweden, great powers that were allowed to settle peacefully into secondary status at the periphery of Europe at the end of their time of glory, Poland endured its decline at the strategic crossroads of the continent. Lacking central leadership and impotent in foreign relations, PolandLithuania became a chattel of the ambitious kingdoms that surrounded it, an immense but feeble buffer state. During the reign of Peter the Great (1682-1725), the commonwealth fell under the dominance of Russia, and by the middle of the eighteenth century Poland-Lithuania had been made a virtual protectorate of its eastern neighbor, retaining only the theoretical right to self-rule.

Data as of October 1992