 Complete the following phrase:  Following the outbreak of World War I, Gerok was appointed commander of the 54th Reserve Division 2nd Royal Württemberg on 25 August 1914, and on 30 August promoted to the rank of infantry general. He was succeeded as divisional commander by Infantry General Paul von Schaefer and on 11 September 1914 appointed general in command of the XXIV Reserve Corps. He led them in battle first on the Western Front in the Battle of Lille 2628 October 1914 and the 