The main effort of the enemy upon March 24 was directed against the Fifth and Seventh Corps in the centre of the British line, though his energy at other points was sufficient to engage the full attention of all the other units. Heavy and fresh masses were poured in at the centre and the pressure was great. For the Seventh Corps it was the fourth day of incessant and desperate fighting. There were few men left, and these were very exhausted. Towards evening the left of the Seventh had been turned, and had been compromised by the occupation of Sailly Saillisel. All attempts at counter-attack, however gallant, were destined to failure, or at the best evanescent success, for there was not the weight to carry them through. At 4.15 the report was: "The enemy is through on the right flank and has occupied Combles, Morval, and Lesbœufs." The Seventh Corps then fell back to the line Hem-Maurepas and threw out every stray unit it could get together--troops of cavalry, Canadian motor-guns, crews and machine-guns of tanks, and all the powdered débris {122} of broken formations, in the direction of Bernafoy Wood to cover the exposed flank. It was still out of touch with the Fifth Corps. This movement gave the line an awkward angle from Peronne and made it almost impossible to hold the stretch of river. For the time the right of the Third Army was a good five miles behind the left of the Fifth Army--the result, as Sir Douglas Haig has stated, of an unauthorised local withdrawal due to misunderstanding of orders. The line near Peronne was still held by the Thirty-ninth Division. Throughout the morning of the 24th strong enemy forces were seen by them pushing forwards between Clery and Rancourt, where they were harassed by the British fire in enfilade, particularly on the roads, where the artillery of the Sixteenth and Thirty-ninth Divisions caused much havoc and confusion, doing great work at short range over open sights. Many excellent targets were missed, however, owing to that difficulty in liaison between the infantry and the guns, which was one of the greatest problems of the operations. During the day the average number of rounds fired per battery was 3000, most of which were observed fire.