The Blue Line of the Vosges Mountains

“The Blue Line of the Vosges Mountains” (translated from “La ligne bleue des Vosges”), comes from the fact that after the Franco- Prussian War (the War of 1870), Germany annexed what we always refer to as Alsace Lorraine but was more precisely Alsace and Moselle (just a part of Lorraine), and the Vosges regained their status as a border between France and Germany. So this line became the symbol of the French revenge and animosity against the Germans and remained that way until the First World War.