Kingdom of Bohemia
The Kingdom of Bohemia, was a medieval and early modern monarchy in Central Europe, the predecessor of the modern Czech Republic. It was an Imperial State in the Holy Roman Empire, and the Bohemian king was a prince-elector of the empire. The kings of Bohemia, besides Bohemia itself, also ruled other lands belonging to the Bohemian Crown, which at various times included Moravia, Silesia, Lusatia, and parts of Saxony, Brandenburg, and Bavaria.
In 1740 the Prussian Army conquered Bohemian Silesia in the Silesian Wars and forced Maria Theresa in 1742 to cede the majority of Silesia, except the southernmost area with the duchies of Cieszyn, Krnov and Opava, to Prussia. In 1756 Prussian King Frederick II faced an enemy coalition led by Austria, when Maria Theresa was preparing for war with Prussia to reclaim Silesia. The Prussian army conquered Saxony and in 1757 invaded Bohemia. In the Battle of Prague (1757) they defeated the Habsburgs and subsequently occupied Prague. More than one quarter of Prague was destroyed and the St. Vitus Cathedral suffered heavy damage. In the Battle of Kolín, however, Frederick lost and had to vacate Prague and retreat from Bohemia.
Saxony
Saxony is a landlocked state of Germany, bordering the states of Brandenburg, Saxony-Anhalt, Thuringia, Bavaria, as well as the countries of Poland and the Czechia. https://en.wikipedia.org/wiki/Saxony
Zwenkau
is a town in the district of Leipzig, in Saxony, Germany. https://en.wikipedia.org/wiki/Zwenkau
Zwickau
is a town in Saxony, Germany, and the capital of the Zwickau district. It is situated in a valley at the foot of the Erzgebirge mountains https://en.wikipedia.org/wiki/Zwickau