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Treaty of Königsberg

Treaty of Königsberg

1656
The Treaty of Königsberg was concluded on 7 January / 17 January 1656 during the Second Northern War. Frederick William I, the "Great Elector" of Brandenburg and duke of Prussia, was forced to join the Swedish camp and became a Swedish vassal for... Wikipedia
Start date: January 17, 1656
Signed: 17 January 1656