Scandinavia is a parliamentary constitutional monarchy, and a real union that consists of three constituent kingdoms: Denmark, Norway, and Sweden, with powers to manage internal affairs being devolved from the central government to its constituent kingdoms.
Scandinavia borders West Germany to the south via Jutland Peninsula, and borders the Soviet Union to the northeast and Finland to the east via Scandinavian Peninsula. The island of Greenland in the Arctic Archipelago which is geographically a part of the North American continent, is has a maritime borders with Canada, making Scandinavia one of largest transcontinental countries in the world.
In 1397, Denmark entered into a personal union with Norway and Sweden, united under Queen Margaret I. The three countries were to be treated as equals in the union. Thus, much of the next 125 years of Scandinavian history revolves around this union, with Sweden breaking off and being re-conquered repeatedly until the Swedish King, Gustav Vasa, conquered the city of Stockholm on 17 June 1523.
The Protestant Reformation came to Scandinavia in the 1530s, and following the Count's Feud civil war, Denmark converted to Lutheranism in 1536. Later that year, Denmark entered into a union with Norway.
After Sweden permanently broke away from the Kalmar Union in 1523, Denmark tried on two occasions to reassert control over Sweden. The first was in the Northern Seven Years War which lasted from 1563 until 1570. The second occasion was the Kalmar War when King Christian IV attacked Sweden in 1611 but failed to accomplish his main objective of forcing Sweden to return to the union with Denmark. The war led to no territorial changes, but Sweden was forced to pay a war indemnity of 1 million silver riksdaler to Denmark, an amount known as the Älvsborg ransom.
Frederick VI became King of Denmark-Norway in 1808 and King of Sweden in 1809 that brought three countries again into a personal union. Following the Danish-British Gunboat War, Denmark-Norway went bankrupt and the Danish-Norwegian union was dissolved by the Treaty of Kiel in 1814. Norway gained its independence and the heir presumptive of the kingdoms of Denmark and Norway, Christian Frederick, elected as the King of Norway.Christian Frederick assumed the Danish and Swedish thrones in 1839 and become Christian VIII of Denmark and Christian III of Sweden. Denmark, Norway and Sweden once again been put into a personal union. After the Second War of Schleswig in 1864, Denmark was forced to cede Schleswig and Holstein to Prussia following the Peace of Prague. In 1865, Denmark, Sweden and Norway signed the Treaty of Stockholm that established a union called the United Kingdom of Scandinavia with Christian IX of Denmark was elected King of the Scandinavians as King Christian I of Scandinavia.
Started from late decades of 18th century, simple men with little education replaced professors and professionals in positions of power in Scandinavia. The peasants, in coalition with liberal and radical elements from the cities, eventually won a majority of seats in the Folketing. In 1890, King Christian I asked Arvid Posse, a member of Landsting from Left Venstre Party, to form a government. This began a tradition of parliamentary government, and no government since 1890 has ruled against a majority in the Parliament.
Scandinavia mostly remained neutral at the start of World War I. However, the government of Enevold Sørensen finally declared war against Central Powers in 1917. After the defeat of Germany, Scandinavia retaken the region of Northern Schleswig from Germany. The reunion day (Genforeningsdag) is celebrated every June 15 on Valdemarsdag. Scandinavia also participated in the Allied intervention in the Baltic countries against the Soviet Red Army during the Russian Civil War.In 1920, the Agrarians emerged as a main conservative force in Scandinavia, enabled them to form a majority government with Arvid Lindman as prime minister. Lindman's government attempted to recover and revitalize country's economy that hardly challenged by the economic crisis brought on by the war. With supports from the Social Democrats and the Radical Liberals, the universal suffrage was introduced in Scandinavia in 1921. Despite Lindman's successful social and economic reforms, the Social Democrats able to form a minority government in 1924 with the Radicals with Hjalmar Branting as the country's first Social Democratic prime minister.
After 1924 election, the Agrarians and the Social Democrats emerged as two main political forces in Scandinavia, while the Radicals usually acted as a third party, shifted themselves in coalition with both sides. Most of Scandinavian conservatives, mainly from the Højre and the Old Venstre, were rallied behind the Agrarians. On other side, the Social Democrats was able to transform itself from a class-based party into a popular party, despite an earlier split by the Scandinavian Communist Party.Following the wake of Great Depression in Scandinavia, the Social Democrats gloriously won the 1929 election and able to form the first Social Democrat majority government with Thorvald Stauning as its prime minister. Under Stauning, Scandinavia developed a social welfare state for the first time. Stauning also formed a major political compromise with the Agrarians and the Radicals, that would last until 1940 and brought political stability in Scandinavia at the wake of political radicalism in Europe.
Traumatized by the nightmare of World War I, Scandinavia proclaimed itself as a neutral country in 1934. Scandinavia recognized and established the commercial relations and economic cooperation with the Union of Soviet Socialist Republics in 1936, as well as signed a 10-year non-aggression pact with Nazi Germany in 1939. However, despite declared neutral, Scandinavia formed a military alliance with Finland, Estonia, and Latvia, known as "Northern Entente", in 1937.
After Germany's invasion of Poland and Czechoslovakia in 1939, World War II broke out in Europe. Amid being neutral, Scandinavia faced a danger of invasion since it was wanted to be included into the Greater Germanic Reich by the Nazis. The Scandinavian government was pressured by the United Kingdom and France to re-arm and to impose the iron ore embargo against Germany. The embargo was issued in February 1940, resulted to Germany's invasion of Scandinavia in April 1940.Scandinavia was unprepared for the German surprise attack. Copenhagen was easily captured after a few hours, although the military and naval resistance lasted for two months. The armed forces in the north launched an offensive against the German forces in the Battles of Narvik, until they were forced to surrender on June 10 after losing British help diverted to France during the Germany's invasion of France. Elements of Scandinavian government led by John Christmas Møller was fled to London, while King Christian II remained in Copenhagen throughout the occupation.
In exile, the Free Scandinavian forces was formed, consists of the soldiers and officers deployed outside Scandinavia or who had fled with Møller. Through BBC Radio service, Møller regularly spoke out against the occupation and encouraged sabotage and other resistance activities. During the years of occupation, Scandinavian resistance movement fought the German occupation forces with both civil disobedience and armed resistance including the destruction of Norsk Hydro's heavy water plant and stockpile of heavy water at Vemork, which crippled the German nuclear program.