The Greater Poland Uprising (1918-1919) was a successful Polish rebellion against German rule in the Poznań region. Starting after WWI on December 27, 1918, Polish residents took up arms following a visit by Ignacy Paderewski. The well-organized uprising quickly secured control of most of Greater Poland. The Treaty of Versailles confirmed Polish control over the region, making it one of few successful Polish uprisings and securing important territory for the new Polish state. (Summary by Anthropic Claude)

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