What World War I battle took place the month before Max von Hausen was relieved of command?
Max von Hausen:  He was relieved of his command because of illness in September 1914. First Battle of the Marne:  The battle was the culmination of the German advance into France and pursuit of the Allied armies which followed the Battle of the Frontiers in August and had reached the eastern outskirts of Paris.
Battle of the Frontiers