During the 18th Century, the Electorate of Saxony was a rich state of the Holy Roman Empire. Northern Saxony was one of most fertile parts of Germany, though fertility diminishes toward Ore Mountains of the south where Saxony long had important mineral production. The House of Wettin ruled Saxony since 1429. Between 1697 and 1763, the Electors of Saxony were also elected Kings of Poland. The Elector Friedrich August I (12 May 1670-1 February 1733), also known as "Sun King" of Saxony, was elected King of Poland with the support of Austria and the help of Russia when the former King Stanislaw I Leszczynski, supported by France, was forced to flee after the Swedish defeat of Poltava in 1709. The Elector married Maria Josepha, sister of the Emperor Charles VI of Austria. The Emperor, having no male heirs was obsessed with the partition of the vast Imperial territories after his death. He issued on 19 April, 1713, an edict to ensure that the Habsburg hereditary possession could be inherited by a daughter, the Pragmatic Sanction. Friedrich August I recognised the edict. When Friedrich August died in 1733, Leszczynski, the archenemy of the House of Wettin, with the support of France and Spain, contested the election of Friedrich August II of Saxony as King of Poland. This led to the War of the Polish Succession.

The new Elector inherited an efficient and modern army. Forged by Field Marshall von Flemming on new lines between 1717 and 1727, this re-born army could match the other European countries. Friedrich August II, aided by the Russian army and supported by Austria, managed to defeat Leszczynski's supporters, and after a short but bloody conflict he was elected King of Poland. Next the Saxon army fought as an auxiliary in the Austrian service in Hungary against the Turks, and on the Rhine against the French. In 1741, Saxony reneged on the Pragmatic Sanction and sided with France, Bavaria, and Prussia when Friedrich II of Prussia invaded Silesia after the death of Emperor Charles VI. The Saxons fought against Maria Theresia's Austrian army during the First Silesian War, occupied Prague and campaigned in both Bohemia and Moravia. Thereafter, Prussia signed a unilateral peace with Austria. Saxony signed a separate cease-fire and France was left alone. Years of armed peace followed until the Second Silesian War. During the war, Saxony sided with Austria. The Prussian army crossed the border and