Sir John Nixon had been succeeded by Sir Percy Lake, but the advancing force was under the immediate command of General Aylmer. On 21 January he failed to carry the first of the lines at Umm-el-Hanna, although it was announced in Parliament that British forces had reached the last position at Es Sinn; and it was not till 7-8 March that Aylmer made a bold attempt at once to turn the Sanna-i-Yat defences and relieve Kut by a surprise attack on the right bank of the river. Everything depended once more upon initial success, for length of communications and lack of supplies made continuous pressure impossible; and the Turks were ready and their defences strong. Aylmer was no more fortunate at Es Sinn than Townshend at Ctesiphon, and the command was taken by General Gorringe. He reverted on 5 April to the lines on the left bank at Umm-el-Hanna. They were carried, and twelve hours later the further line at Felahiyeh. Keary's Lahore division had been equally successful on the right bank; but a flood caused by the melting snows on the Armenian hills interposed to bar the way to the relief of Kut. A final attempt was made on the 23rd across the water-logged land in front of Sanna-i-Yat; but advance was impossible along the narrow causeway which alone gave foothold for the troops, and on the 29th Townshend's force in Kut, consisting of 2000 British and 6000 Indian troops, surrendered after a siege of nearly five months. After Gallipoli, Mesopotamia. Until March 1918 our reverses in these two "side-shows" were counted our worst disasters in the war, and to the electorally-heated imagination of Mr. Lloyd George they appeared even later as the sum and substance of British achievement before he became Prime Minister. In the case of Kut the responsibility rested mainly with the Indian Government, to which also was due our brilliant recovery in the East when Lord Chelmsford, Sir Charles Monro, and Sir Stanley Maude--all appointed in 1916--had time to retrieve the mistakes of their predecessors in the Viceroyalty, Command-in-chief of the Indian Army, and command of the Mesopotamian forces. Meanwhile, it was fortunate for the prestige of the Entente in the East that Russia's collapse in Europe appeared to have no effect upon the vigour of her action in the middle East. The Grand Duke Nicholas, who had been transferred to the command in the Caucasus, found an admirable chief of staff in General Yudenitch, and between them they brought off a stroke against Turkey which was more sensational than the Turks' success at Kut and Gallipoli.