 Complete the following phrase:  General von Plessen also held the office of His Majestys Orderly Adjutant General  to Kaiser Wilhelm II, thus making him one of the Emperors closest confidants. By 1918 he was the oldest serving officer in the Imperial German Army, although Paul von Hindenburg falsely claimed this for himself. In 1918, von Plessen was awarded the Pour le Mérite, Germanys highest military honor. He remained devoted to the Kaiser until the 