Before it took place on 20 March 1921, two Silesian uprisings had been organised and instigated by Polish inhabitants of the area. Poland won 41% of the votes in the plebiscite, and a plan for the division of Upper Silesa was then made.that led to a new phase of the Silesian Uprisings, the so-called Third Silesian Uprising and the Battle of Annaberg. The result of the 1921 referendum was legally nonbinding and was ignored.