This has led to a conflict over the rights to the name, logo, history, international contacts and property of the NKU, which lasted until July 2008.

In 1903 in the city of Drammen as Young Social Democrats of Norway (NSU) as the youth wing of the Norwegian Labour Party.

In the period 1941–1945 the Youth League was part of numerous sabotage-raids against Germans and German-aiding production, several of their members also contributed directly in the war effort.

In the next few years the youth league would disagree so much with the communist party that it resulted in an open political conflict within both organizations between the so-called Furubotn-fløy and the Løvlien-fløy.

The youth league became less prominent in Norwegian politics as the communist party lost its seats in the Storting.