SprueStack Zero Hour: WW2 day by day
17 September 1939
What happened on this day in the Second World War, from 1939 to 1945, with a source for every entry.
About this page
Each day we list events from the Second World War that happened on that date, from 1939 to 1945. Every entry names its source and links to it, so you can read further. Entries are sourced and machine-screened before they go up, a subset is human-reviewed, and we add more over time.
2 sourced entries for this date.
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Entries
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Invasion of Poland
Furthermore, the Polish Army was preparing the Romanian Bridgehead, which would have prolonged Polish defence, but the plan was invalidated by the Soviet invasion of Poland on 17 September 1939.
Sources listed with each entry. Spotted an error? Tell us.
17 September in other years 19401941194219431944
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