Treaty of Bonn: The Frankish kings Charles the Simple and Henry the Fowler sign a peace treaty or 'pact of friendship' (amicitia) to recognize their borders along the Rhine.

On 7 November 921, the Treaty of Bonn, the text of which calls itself a "pact of friendship" (amicitia), was signed between Charles III of France and Henry I of Germany in a minimalist ceremony aboard a ship in the middle of the Rhine not far from Bonn. The use of the river, which was the border…