Sweden is an ideological center between the seventh and ninth century AD around the city, "Uppsala", which launched campaigns of the Vikings (Raiders of the North) to the countries of the region. Kalmar Union was established in 1397, which included the three Scandinavian countries Sweden, Denmark and Norway.
Shining star of the Kingdom of Sweden since its independence in 1523 and after the exit of Danish ruler until gradually became one of the great countries of Europe, until 1721 when it lost the war of the North (from 1700 to 1721) to Russia and gave up several areas in the Baltic Sea then managed to defeat Napoleon in 1814, and became union with Norway after that.
Sweden followed a neutral policy has ensured peace at time of war, where it was declared complete neutrality during World War I (1914-1919) and joined the League of Nations in 1920. As also announced its neutrality in World War II (from 1939-1945) and then joined the United Nations in 1946. And was later a founding member in 1948 of the European Organization (OEEC) and in 1949 joined the Council of Europe and in 1952 joined the Nordic Council and in 1960 joined the European Free Trade Association (EFTA).
In 1994 Swedes voted by a narrow margin to join the European Union
At the year 1953 Hammarskjold (Hammarskjold) was elected secretary-general of the United NationsThe assassination of Prime Minister Olaf Palme in the 1986 was a shook to the politicians and society in Sweden and has remained to this day the killer is unknown..