![Invading German troops approach Bydgoszcz. Poland, September 18, 1939. [LCID: 70010]](https://encyclopedia.ushmm.org/images/large/13b8832d-062a-43cf-ac5c-261937ff54c9.jpg)
A German motorcycle unit advances through the Bydgoszcz region during the invasion of Poland. September 18, 1939.
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