 Complete the following phrase:  In August 1914 the command of 5th Army was assigned to Crown Prince Wilhelm of Germany, heir to the Hohenzollern throne, with General Schmidt von Knobelsdorf serving as his chief of staff, and would remain thus until late 1916. The opening hostilities on the Western Front saw the Crown Princes 5th Army, along with the neighboring 4th Army commanded by Albrecht, Duke of Württemberg, acting at the center of the Schlieffen plan attack into Belgium and France. On 21 August 1914, in what became known as the Battle of the Ardennes, 4th and 5th Armies advanced into the Ardennes to counter a thrust by the French 3rd and 4th Armies. Over the next two days 5th Army played a major part in halting the opposing French forces. By 23 August, after taking heavy losses and being outmaneuvered strategically, the two French armies were driven into retreat. Following the German 5th Armys victory in the 