Electorate of Mainz
The Thirty Years' War arrived and reached Holungen, and in 1626, much devastation was caused by the army of Duke Christian of Brunswick. In 1701, Prussia became a kingdom, but Eichsfeld and Holungen remained subordinate to the Electorate of Mainz. Between 1740–1786 Eichsfeld took up arms in the service of Austria against Frederick the Great and fought against Prussia. Many inhabitants of Holungen were involved in these wars or were enlisted with the “Kurmainzischen Husarencorps” (Hussar Corps of the Electorate of Mainz). Thus even today there are still some Holungen surnames in Vienna. In 1802, Eichsfeld was finally annexed to Prussia. This took place on 3 August, the birthday of the King of Prussia Frederick William III.