Byng commanded four attacking divisions, one division in reserve and numerous support units. He was supported to the north by the 24th Division, I Corps, which advanced north of the Souchez river and by the XVII Corps to the south. The 4th Canadian Division was responsible for the northern portion of the advance that included the capture of the highest point of the ridge, followed by the elaborately fortified Pimple just west of the village of Givenchy-en-Gohelle. The 3rd Canadian Division was responsible for the narrow central section of the ridge, including the capture of La Folie Farm. The 2nd Canadian Division, which later included a brigade from the 5th Division, was directly south of 3rd Canadian Division and entrusted with the capture of the village of Thélus. The 1st Canadian Division was responsible for the broad southern sector of the corps advance and expected to cover the longest distance. Byng planned for a healthy reserve for contingencies that included the relief of forward troops, help in consolidating positions and aiding the 4th Canadian Division with the capture of the Pimple. As a result, the 9th Canadian Brigade and the British 15th and 95th Brigades were kept in corps reserve.