From 1919 to 1921 three Silesian Uprisings occurred among the Polish-speaking populace of Upper Silesia; the Battle of Annaberg was fought in the region in 1921. In the Upper Silesia plebiscite of March 1921, a majority of 59,4% voted against merging with Poland and a minority of 40,6% voted for, with clear lines dividing Polish and German communities. The exact border, the maintenance of cross-border railway traffic and other necessary co-operations, as well as equal rights for all inhabitants in both parts of Upper Silesia, were all fixed by the German-Polish Accord on East Silesia, signed in Geneva on May 15, 1922. On June 20, the Weimar Republic ceded, "de facto", the eastern parts of Upper Silesia, becoming part of the Silesian Voivodeship of the Second Polish Republic. Within Weimar Germany, the Prussian Province of Silesia was divided into the provinces of Upper Silesia and Lower Silesia The territory remaining in Prussian Upper Silesia was administered within the Oppeln Region and — according to Polish sources — had 530,000 Poles within it.