Which river did the Treaty of Saint-Germain-en-Laye expand Brandenburgian Pomerania to?
Rhine
Danube
Elbe
Lower Oder
Answer
The Treaty of Saint-Germain-en-Laye, signed in 1679, expanded Brandenburgian Pomerania to the lower Oder River. This expansion was part of Brandenburg-Prussia's efforts to increase its territory and influence in the region.
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