On April 3 the battalion went forward from Sheikh Saad to the front line in readiness for the intended assault on Umm-el-Hanna in an attempt to break the Siege of Kut, in which they were to take the foremost part. At 4.45 on the morning of April 5 the attack started, the Royal Warwickshire being on the extreme left on the river bank. The position was weakly held and by seven o'clock five successive lines of Turkish trenches had been carried with few casualties. The advance continued till noon, when the battalion dug temporary cover and rested. At nightfall the attack on the next position at Falahiyeh began. The advance had to be made over flat ground, and the Royal Warwickshires coming under heavy fire suffered severely. Nevertheless Falahiyeh was taken by the combined efforts of the 9th Royal Warwickshire and the 9th Worcester, as the climax of the one brilliantly successful day in the attempted relief of Kut. The chief credit rested with the 13th Division, who between dawn and midnight had stormed two whole labyrinths of trenches. The Royal Warwickshire had 7 officers [including Captains Baker and Marshall] and 35 men killed or mortally wounded, including Arthur, with 7 officers and 154 men wounded.