Treaty of Ribemont
The divisions of the Frankish Empire came with the Treaty of Ribemont to completion. This contract was in the year 880 between the East Frankish King Ludwig III. and the grandsons of Charles the Bald, Louis III. and Carloman, closed. An important part of the contract was that now the western part Lotharingiens fell to the eastern kingdom. The border between the Western and Eastern Empire lasted into the early modern period ( the Peace of Westphalia in 1648 ) almost unchanged.
The reasons for the new contract had aspirations of Charles the Bald, who was also emperor since 875, the area Lotharingiens fully incorporate. This plan failed, however, after he was defeated in the Battle of Andernach 876 of Ludwig III. , The son of Louis the German. Instead, the sons of Louis the German conquered the entire western part of the East Frankish kingdom Lotharingiens. This was then confirmed or established by the Treaty of Ribemont.
Manfred tickler. Historical Atlas Germany, page 19 ( Carolingian Empire divisions), Christian Brandstätter Verlag, Vienna, 1997, approved license issue for publisher Weltbild GmbH, Augsburg, ISBN 3-8289-0358-4