Occupation
Soviet invasion of Poland
17 Sept 1939 – 6 Oct 1939 · Eastern Poland
On 17 September 1939 the Red Army crossed Poland's eastern border, in line with the secret protocol of the Molotov–Ribbentrop Pact. The occupied territories were annexed to the Soviet Ukrainian and Byelorussian republics; mass arrests and deportations followed.
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- [1]Soviet invasion of Poland
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