April 20, 1940
Union of Retaliation
Union of Retaliation - a secret subversive organization established on April 20, 1940, within the Union of Armed Struggle. It conducted sabotage and subversive actions against the German occupier, significantly weakening its military and economic potential. The organization operated until November 1942, when it was incorporated into the structures of the Home Army's Directorate of Diversion.
