What was the result of the plebiscite in Upper Silesia in 1921?

The plebiscite in Upper Silesia in 1921 was conducted to determine whether the predominantly industrial region should remain part of Germany or be transferred to Poland following World War I. The result of the plebiscite showed strong support for both sides, reflecting the ethnic and national divisions in the area. Ultimately, due to the closely contested nature of the vote, the League of Nations intervened and decided to divide the region between Germany and Poland. This division allowed both countries to maintain a presence in Upper Silesia and also aimed to address the national and economic interests of the local populace. This outcome highlights the complexities of post-war territorial adjustments and the challenges in satisfying national aspirations in ethnically diverse regions.