Józef Kustroń
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Józef Rudolf Kustroń (16 October 1892 – 16 September 1939) was a brigadier general of the Polish Army in the Second Polish Republic, commandant of the 21st Mountain Infantry Division.[1] He was the first Polish general to die during the German invasion of Poland, and the second general officer casualty of the campaign overall; the first was Wilhelm Fritz von Roettig.