Former state unions

federal republic (1992–2003) and political union (2003–2006) in the Balkans

historical multinational monarchist state in Eastern Europe (Crown of the Kingdom of Poland and the Grand Duchy of Lithuania)

Middle Eastern state between 1958 and 1961 in the present territories of Egypt and Syria

former country. personal union of the three kingdoms of Denmark, Sweden and Norway (1397–1523)

Denmark–Norway was a 16th-to-19th-century multi-national and multi-lingual real union consisting of the Kingdom of Denmark, the Kingdom of Norway (including the then Norwegian overseas possessions: the Faroe Islands, Iceland, Greenland, and other possessions), the Duchy of Schleswig, and the Duchy of Holstein. The state also claimed sovereignty over three historical peoples: Frisians, Gutes and Wends. Denmark–Norway had several colonies, namely the Danish Gold Coast, Danish India (the Nicobar Islands, Serampore, Tharangambadi), and the Danish West Indies.

personal union between Sweden and Norway 1814–1905