Southern Jutland after the city of Schleswig ("Slesvig"). The dukes of Schleswig also became kings of Denmark. With the demise of the Holy Roman Empire in the 19th century, the term "Sønderjylland" was revived by Denmark and became the subject of a naming dispute between Danes and Germans (the latter continuing the centuries-old "Schleswig") - part of the struggle over possession of the territory itself, which came to war in 1848 and again in 1864. Following the Schleswig Plebiscites in 1920, South Jutland was divided into Northern and Southern Schleswig. Northern Schleswig was also known as South Jutland County (1970–2006) and is
Third-country economic relationships with the European Union is considered part of the EU single market. Iceland has also signed the Schengen treaty. On 16 July 2009, Iceland applied to join the European Union. Liechtenstein joined the EEA in 1995 and participates in the EU single market. Switzerland referendum to join the EEA in 1992 failed, so Swiss products do not participate in the European single market. However the country recently negotiated two series of bilateral agreements with the Union. The first series, Bilateral Agreements I, consists of seven bilateral agreements and was signed in 1999 (entry into force in 2001), the main part being Free Movement of