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March Action posters on the Plauen
The March Action (German "März Aktion" or "Märzkämpfe in Mitteldeutschland" ("The March battles in Central Germany") was a 1921 workers revolt, led by the Communist Party of Germany, the Communist Workers' Party of Germany, and other radical left-wing organisations. It took place in the industrial regions located in Halle, Leuna, Merseburg, and Mansfeld. The revolt ended in defeat for the workers, and a weakening of contemporary communist influence in Germany.