On October 24th these troops attacked in force. The Italians in the front line, mistaking them for the friendly Austrians, waved a greeting. German machine guns and rifles replied with a deadly fire, and the great flanking movement commenced. So well had the Germans played their game the Italians lost more than 250,000 prisoners and 2,300 guns in the first week. The attack began in the Julian Alps and continued along the Isonzo southwestward into the plain of Venice. The Italian positions at Tolmino and Plezzo were captured and the whole Italian force was compelled to retreat along a seventy-mile front from the Carnic Alps to the sea. The most important point gained by the enemy in its early assault was the village of Caporetto on the Upper Isonzo where General Cadorna held a great series of dams which could have drained the Isonzo River dry within twelve hours. The Italian retreat at places degenerated into a rout and it was not until the Italians, reinforced by French and British, reached the Piave River, that a stand was finally made. The defeat cost Cadorna his command, and he was succeeded by General Armando Diaz, whose brilliant strategy during the remainder of the war marked him as a national hero and one of the outstanding military geniuses of the war. The order for a general retreat was issued on October 27th. Poison gas shells rained blindness and death upon the retreating Italians and upon the heroic rear-guards. The city of Udine and its environs were emptied of their inhabitants; and Goritzia, which had been wrested after a desperate effort from the Austrians, was retaken on October 28th. That the entire Italian army escaped the fate that had come to the Russians at the Masurian Lakes was due mainly to the Third Army commanded by the Duke of Aosta. During the long running fight, it faced about from time to time and drove the Germans back in bloody encounters. By November 10th the Italian forces had come to the hastily prepared entrenchments on the west bank of the Piave River. The Austrians and the Germans dug in on the east bank of the stream from the village of Susegana in the Alpine foothills to the Adriatic Sea. Here a long-drawn-out battle was fought, resulting in enormous losses to the Germans and Austrians. By this time reinforcements had come up from the French front and every attempt by the enemy to gain ground met a bloody check. The hardest fighting was on the Asiago Plateau. There, although the Italians were greatly outnumbered, the concentration of their artillery in the hills overlooking the great field completely dominated the situation. A factor that was of the utmost value in checking the Austrians was the system of lagoon defenses running from the lower Piave to the Gulf of Venice.