Duchy of Courland and Semigallia (1918)

The Duchy of Courland and Semigallia was a proposed client state of the German Empire during World War I which did not come into existence. It was proclaimed on 8 March 1918 in Jelgava (German: Mitau), the capital city of the German-occupied Courland Governorate, by a council composed of political representatives of Baltic Germans, who offered the ducal crown to German emperor Wilhelm II, thus bypassing the old ducal House of Biron, that previously ruled over the historical Duchy of Courland and Semigallia until 1795.

Source: Wikipedia — Duchy of Courland and Semigallia (1918) (CC BY-SA 4.0)