Scandinavian defence union

Finland had fought two wars, the Winter War and the Continuation War, against the Soviet Union; and also one minor war, the Lapland War, against Nazi Germany. Before these wars Finland had close relations with the Scandinavian countries. After the Continuation War where the Soviet Union forced Finland to sue for peace, but failed in its goal of conquering and annexing the country (in a manner similar to the Baltic States), Finland became neutral and retained a democratic government and a market economy. However, as the country shared 1,300 kilometres of border with the USSR, the position of the Soviet Union could not be ignored in Finnish politics. Regarding the Finnish membership in the Scandinavian defence union, far reaching discussions at state-level were made with the other candidate countries. These discussions were abruptly ended, when Sweden made a specific requirement, that approval from the Soviet Union must be received if Finland was to join. The Soviet answer was bluntly negative and Finland stayed neutral. In 1948, Finland had signed the YYA Treaty with the Soviet Union, and according to the Soviet point of view, this agreement prohibited Finland's membership in any alliances that it could consider being of military nature, even in those created for defensive reasons.

Both Denmark and Iceland showed a clear preference for joining the Scandinavian Defence Union over NATO.[1][2] According to a 2018 literature review, the reasons why Danes preferred a Scandinavian military alliance over a North-Atlantic one were "ideology (pan-Scandinavianism), the domestic political situation, a strong belief in Swedish military power, and, especially given the different policies of the three Nordic countries, various lessons drawn from the Second World War."[1]

The proposed union was discussed by a joint Scandinavian committee during the winter of 1948-1949, but the Cold War tensions between the United States and the Soviet Union, and preparations for a western alliance that would result in the North Atlantic Treaty proved that the efforts were in vain. When it became known that the western alliance would not be able to supply the Scandinavian countries with armaments before meeting their own pressing needs, this issue ultimately proved to be the turning point for Norway, which resigned from the talks. Denmark was still willing to enter into an alliance with Sweden, but the Swedes saw few advantages in this and the proposal failed. Norway and Denmark subsequently became signatory parties of the North Atlantic Treaty and members of NATO.

Sweden chose not to join NATO, despite a fierce debate on the issue. One of the strongest proponents was Herbert Tingsten, editor-in-chief of Dagens Nyheter, the largest newspaper in Sweden, who used editorials to argue why Sweden should join. He found a great opponent in the foreign minister of the time Östen Undén, who argued that Sweden should stay non-aligned and remain neutral in case of war. The position of Sweden as a member of the western world was not in doubt, but it could not, based on the choices it had made on foreign policy, join the western military alliance.

Whilst not a defence union, the Nordic Battlegroup is a multi-national military unit. It is one of eighteen European Union Battlegroups that support European Union defence and security objectives. It consists of around 2,500 troops from Sweden, Finland, Norway, Ireland, Estonia, Latvia and Lithuania.[3]

Wanting a more integrated military in the Nordic countries, the Nordic militaries have begun a search for a Nordic Combat Uniform (NCU). The countries have each provided a list of demands to suppliers, wanting customization and ability to work in all climates. The NCU will be in MultiCam for the Danish military, while it will be possible for the countries to have a camouflage specific to their needs. The NCU is expected to arrive in 2020.[4][5]

The Nordic Defence Cooperation (Nordefco) is an ad-hoc collaboration established between the Nordic countries in 2009.