On October 24th (1917) the Italian eastern front was suddenly shaken by a hammer-blow from the German central command. A new army under the redoubtable Mackensen, secretly assembled behind the screen of the mountain ridges, took over the attack from the nerveless Austrians.[110] This German force made a sudden assault under cover of mist against a weak point in the Italian line. They attacked and penetrated the Second Italian Army in the neighbourhood of Tolmino on the Upper Isonzo. Only one Italian regiment gave way, probably weakened by enemy influences. But at such a critical point one was enough. It was like a small hole in a great dyke. The flood of German invasion swept in, and soon began to submerge the plain of Venetia. During the following week the Austro-German armies advanced by forced marches from the north-east and captured Cividale and Udine. The heroic Third Italian Army, conquerors of Gorizia, held on to the line of the Isonzo for a time. But they were taken in the rear, and it was necessary to command a retreat. Those brave regiments—the Alpini and the Bersaglieri—suddenly fell back, many of them preferring annihilation to retirement. The whole host rallied on the line of the Tagliamento; but in the terrible confusion of the great surprise the Italians lost 300,000 men and 2,000 guns. Italy was now faced with a fearful peril. It was already clear that the line of the Tagliamento could not be held; it was uncertain whether any other line could be held. For if the Germans and Austrians could attain mastery of the Alps to the north every one of those river lines of Venetia would be outflanked; the whole northern plain of Italy would be invaded; the exquisite prize of Venice and the great industrial cities of Turin and Milan would fall as victims to the spear of the enemy. Southern Italy would be cut off from the Western Allies; and, indeed, the whole peninsula would be in danger, and with it our own naval hold on the Mediterranean Sea. None of the Western Allies could be indifferent to the threat of such calamities. Mr. Lloyd George determined in a moment that Britain could not stand by indifferent. He resolved at once that he would not be responsible for a repetition of the calamities which had overwhelmed Serbia and Rumania. The year 1917 should not close as 1915 and 1916 had closed—with the head of a kingdom on a charger presented to the German Herod. But it was necessary to act instantly. There was not a moment to be lost. Mr. Lloyd George decided to go to Italy; and he resolved to go armed with new powers of central control for the conduct of the war. He had made up his mind that it was at last necessary to relieve the Generals of their divided responsibilities by establishing a definite organism of central control.