Maurice, Count of Saxony was a notable soldier, officer and a famed military commander of the 18th century. The illegitimate son of Augustus II the Strong, King of Poland and Elector of Saxony, he initially served in the Army of the Holy Roman Empire, then the Imperial Army, before finally entering French service. De Saxe became a Marshal and even Marshal General of France. He is best known for his deeds in the War of the Austrian Succession and especially for his decisive victory at the Battle of Fontenoy.

The Duchy of Courland and Semigallia was a duchy in the Baltic region, then known as Livonia, that existed from 1561 to 1569 as a nominally vassal state of the Grand Duchy of Lithuania and subsequently made part of the Crown of the Polish Kingdom from 1569 to 1726 and incorporated into the Polish–Lithuanian Commonwealth in 1726. On March 28, 1795, it was annexed by the Russian Empire in the Third Partition of Poland.