The Revigny Gap had opened up between the right of de Langle's Fourth Army and the left of Third Army. A similar, larger, gap, 20km wide, had opened up between Fourth Army’s left and the right of Foch’s Ninth Army. Whilst Joffre was bringing up XV and XXI Corps from Lorraine to plug the gaps, the Germans attacked, although these attacks were unsuccessful in part as a result of squabbling between Albrecht (commander of German Fourth Army) who wanted Wilhelm to support him whilst he enveloped de Langle from the west, whilst Wilhelm wanted Albrecht to support "him" while he pushed into the Revigny Gap between de Langle and Sarrail. Wilhelm eventually appealed directly to his father the Kaiser.