Wilhelm (6 July 1785 – 2 July 1823) Due to mental illness, Wilhelm was duke in name only, with his cousin Peter, Prince-Bishop of Lübeck, acting as regent throughout his entire reign.[7]
25 September – Prussia issues an ultimatum to Paris, threatening war if France does not halt marching its troops through Prussian territory to reach Austria; the message does not reach Napoleon Bonaparte until 7 October, and he responds by attacking Prussia.[15]
9 October – Battle of Schleiz: French and Prussian forces fight for the first time since the war began. The Prussian army is easily defeated, by a more numerous French force.
30 October – Capitulation of Stettin: Believing themselves massively outnumbered, the 5,300-man garrison at Stettin in Prussia surrenders to a much smaller French force without a fight.
^Apfelstedt, F.; Apfelstedt, Heinrich Friedrich Theodor (1996). Das Haus Kevernburg-Schwarzburg von seinem Ursprunge bis auf unsere Zeit. Thüringer Chronik-Verlag Müllerott. ISBN978-3-910132-29-0.
^J. Morley, "The Bauhaus Effect," in Social Utopias of the Twenties (Germany: Müller Bushmann press, 1995), 11.
^Gerhard Schildt: Von der Restauration zur Reichsgründungszeit, in Horst-Rüdiger Jarck / Gerhard Schildt (eds.), Die Braunschweigische Landesgeschichte. Jahrtausendrückblick einer Region, Braunschweig 2000, pp. 753–766.