mar 20, 1921 - Plebiscite to decide the future of Upper Silesia

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Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland. and 60% of people voted Germany. However, Poland claimed most of these votes came from people no longer living in Silesia. They complained and the League split the area. This was accepted, just. Poland had 50% population, but only 33% land, and half a million Poles were in confirmed. German land. Germany lost 75% of their mines.
this could be seen as a success of the league

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