On May 5, 1916, the Germans after an intense bombardment, in which gas shells were lavishly used, tried to turn Hill 304, and also attacked the Camart Wood and Hill 287. On the northern slope of Hill 304 the French trenches were so badly damaged that they could not be held. But the Germans, caught by the French artillery fire, found it impossible to advance. Having failed to reach the plateau from the north, an attempt was made through the ravine and behind the woods west and northwest of Hill 304. This plan was frustrated by the French, who repulsed them with the bayonet. The German attacks having failed everywhere, Hill 304 was subjected to continuous and violent bombardment. In the afternoon of the 7th they attacked again. With the exception of a strip of trench east of the hill, which was retaken the following night, they did not register any advance. Among the German regiments participating in these attacks the following were identified: Regiments of the Eleventh Bavarian Division, a regiment of the Hundred and Ninety-second Brigade, the Twelfth Reserve Division, the Fourth Division, and the Forty-third Reserve Division. From the 13th to the 16th of May, 1916, the Germans continued their attacks on the Camart Wood west of Hill 304. In these operations they employed a fresh corps, the Twenty-second Reserve Corps, for the first time. After a lull lasting a few days the battle assumed an increasing violence on the left bank. In the afternoon of the 20th the Germans threw four divisions to the assault of Mort Homme. During the night and on the following day the battle raged with undiminished fury. At a heavy cost the Germans succeeded at last in capturing some trenches north and west of Mort Homme. At one time the French second lines were seriously threatened, but a spirited defense scattered the attackers. After intense fighting the French won back some of the ground they had lost on Hill 287, and during May 21 and 22, 1916, succeeded in regaining other positions captured by the enemy. The recovery of Fort Douaumont which had been occupied by Brandenburgers since February 25, 1916, was now the aim of the French. General Mangin, one of the youngest officers of that rank in the French army and commanding the Fifth Division, directed operations. The French brought into action their heaviest artillery, which opened a terrific fire on the German lines. The French soldiers accepted it as an omen of success when about 8 o'clock in the morning of May 22, 1916, six captive balloons stationed over the right bank of the Meuse exploded, thus depriving the German batteries of their observers on whom they counted to get the range.