The Zambrów massacre was a war crime that took place on the night of 13–14 September 1939. It was one of the major war crimes of the Wehrmacht during the invasion of Poland. During that night, the makeshift prisoner-of-war camp in Zambrów was disturbed by a number of panicked horses, and more than 200 Polish soldiers, trying to move out of their way, were gunned down by German sentries. Some witnesses later said the horses had been purposely released into the camp by the German sentries, who used the incident as a pretext to massacre the prisoners.
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