 Complete the following phrase:  When World War I began, Duke Albrechts VI Inspectorate Corps was formed into the 4th Army, 123 battalions strong. As King William II had no sons, Albrecht was appointed the armys commander and assigned to the Ardennes, with Walther von Lüttwitz serving as his Chief of Staff. This army he led to victory alongside Crown Prince Wilhelms 5th Army at the 