Original sentence: The plebiscite took place on 11 July 1920
Edited sentence: German Prussia, which controlled those territories for over a century, was able to organize a very successful propaganda campaign, building on the long campaign of Germanization; notably the plebiscite masked the German choice under the regional name of Prussia.Hence the plebiscite ended with a majority of the voters voting for Prussia; only a small part of the territory affected by the plebiscite was awarded to Poland, with the majority going to Germany.The activity of German Freikorps organizations, and support for German position by the Allied commissions, who allowed the Germans to bring over 100,000 German immigrants from that region, further aided the German cause.The plebiscite took place on 11 July 1920; at the time Poland looked as if it was on the verge of defeat in the Polish-Soviet War (see battle of Warsaw (1920))