Falkenhayn sent the 4th Army headquarters to Flanders, to take over the III Reserve Corps and its heavy artillery, twenty batteries of heavy field howitzers, twelve batteries of 210 mm howitzers and six batteries of 100mm guns, after the Siege of Antwerp The XXII, XXIII, XXVI and XXVII Reserve corps, of the six new reserve corps formed from volunteers after the outbreak of the war, were ordered from Germany to join the III Reserve Corps on 8 October.