WW1: What caused Verdun to be the longest battle of the war? documentWW1: What caused Verdun to be the longest battle of the war? Verdun was the longest battle of World War One, lasting a total of ...

Soon after, Lothar I, Louis II, and Charles II went to battle with one another over who would succeed as king. The fratricidal conflict between the three ended with the ratification of the Treaty of ...