The conflict started April 25, 1980, when 1400 workers were chosen to strike. April 30 the workers' union LO said no to a conciliation proposal and the employers answer with a lock-out. Over 100 000 people were chosen to start a strike on Maj 1 which led to 700 000 workers being locked-out from their work places. The conflict endured until Maj 12 when SAF, the employers' union, gave in to LO's demand for raised salaries.
The consequences were big. In Stockholm there were no public transportation and all air traffic stopped. This was the largest strike since the strike of 1909 and the metal workers' strike of 1945.
Source: LO - Åren 1980-1999