In the Hangard sector on the French front, where since the beginning of the offensive the Germans had been hammering away in an effort to get astride the railway connecting Amiens with Clairmont, the British carried out a highly successful operation. At daybreak on April 17-18, 1918, along a front of about five miles between Thennes and Mailly-Renneval, the French launched a dashing assault that resulted in the capture of over 600 prisoners and the seizure of some important points which the enemy occupied. The ground over which the French had to charge had been transformed by recent rains into heavy mud into which the attackers sank at times up to their knees, but they pushed on undismayed. The commanding heights on the northern flank were carried amid victorious cheers. In the center bodies of infantry penetrated Senecat Wood and cleared up the gun emplacements which defended the approaches to Castel. Pressing forward, the French infantry established themselves on the outskirts of the town and prepared for an assault on the place. Toward the south other French units captured dominating heights and advanced toward Anchin Farm on the road between Ailly-sur-Noye and Moreuil. The French advance met with the strongest opposition from the Germans, but their efforts were ineffective and their casualties heavy. The main purpose of the Germans in their continued pounding of the French around Hangard was to prevent reenforcements being sent north. This they failed to accomplish. The French not only fought them off and gained ground, but were able to send a considerable force to the northern front. The fighting around Hangard, which was prolonged for days, was of the most sanguinary description. Desperate hand-to-hand fighting took place in the streets of the town and inside the houses. Hangard changed hands again and again, but was finally occupied and strongly held by the French. The fighting continued with undiminished fury on the northern front, but the Germans made no important gains. Attacks in the Mont Kemmel region were beaten off. At Givenchy, and at other points of the front, the Germans failed to gain ground, while great numbers were slaughtered by the British machine-gun and rifle fire. It was estimated that the Germans employed 137,000 men in their furious assaults on the Allied front extending from Givenchy, eleven miles northwest to the neighborhood of St. Venant. Important reenforcements of French troops strengthened the British resistance in the north, and German masses attempting to break through lost heavily.