The Swedish king also proposed a unification of Denmark, Norway and Sweden into a single united kingdom. The background for the proposal was the tumultuous events during the Napoleonic Wars in the beginning of the century. This war resulted in Finland (formerly the eastern third of Sweden) becoming the Russian Grand Duchy of Finland in 1809 and Norway ("de jure" in union with Denmark since 1387, although "de facto" treated as a province) becoming independent in 1814, but thereafter swiftly forced to accept a personal union with Sweden. The dependent territories Iceland, the Faroe Islands and Greenland, historically part of Norway, remained with Denmark in accordance with the Treaty of Kiel. Sweden and Norway were thus united under the Swedish monarch, but Finland's inclusion in the Russian Empire excluded any possibility for a political union between Finland and any of the other Nordic countries.