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Events on Tuesday 5 July 1921 1
1921Third Silesian UprisingPolish insurgents fight German forces over Upper SilesiaPolish militias launched an armed uprising in Upper Silesia to contest a League of Nations plebiscite that had favored remaining with Germany in most districts. Fighting between Polish and German paramilitaries continued for weeks before an Allied-brokered ceasefire. The League ultimately partitioned Upper Silesia between Germany and Poland the following year.