Challenge: The disaster of 1870 but not 1871

Goal: No French loss of Alsace-Lorraine, either in part or in its entirety
POD limitations: After the Battle of Sedan
Available time: By the present day
 
I read a published AH story in which a French political figure whose name I don't remember bypasses Bismarck and goes straight to the King of Prussia and worked out a peace deal. There was no Franco Prussian War, but since the Prussian had mobilized and marched to the French border, they were already occupying their neighbors and Germany still becomes a united empire but without Alsace Lorraine.
 
Top