The formal abolition of Prussia is proclaimed by the Allied Control Council, the Prussian government having already been abolished by the Preußenschlag of 1932.

The abolition of Prussia occurred on 25 February 1947 by decree of the Allied Control Council, the governing authority of post-World War II occupied Germany and Austria, through Control Council Law No. 46. The decision was grounded in the view that Prussia had long embodied the most reactionary and militaristic elements within German political life. As the engine of German militarism and a key promoter of authoritarianism and expansionist policies, Prussia was seen as fundamentally incompatible with efforts to rebuild Germany as a peaceful and democratic state. Its dominance in German affairs was deemed to have contributed directly to the wars of aggression that had devastated Europe. By dismantling Prussia, the Allies aimed to eradicate the institutional structures most responsible for German aggression.