At dawn on the 20th September, the enemy delivered a heavy attack on the I Corps and on the French left, driving in the Tirailleurs d'Afrique and turning the flank of the West Yorks. The echeloned company formed front to the flank, and the supporting company followed suit. The Germans annihilated the right front company, and, using the white flag ruse, apparently captured some of the next company. Major Ingles, collecting a proportion of the front companies, withdrew a short distance and counter-attacked, but was unsuccessful and lost his life in this gallant endeavour. At about 1 p.m. a counter-attack was delivered by the Sherwood Foresters, who were in Brigade Reserve, the support company of the West Yorks, under Lt.-Col. Towsey, and a squadron of the 18th Hussars from Paissy. These, advancing over the perfectly open ground, recaptured the trenches and gallantly held them against further attacks. In this affair the West Yorks suffered casualties amounting approximately to 15 officers and 600 other ranks, the Sherwood Foresters also losing 12 officers and 180 other ranks. The temporary loss of the trenches by the West Yorks exposed the trenches of the D.L.I, to enfilade machine-gun fire, from which they had considerable casualties, including Majors Mander and Robb. This was the only serious fighting in which the Division was engaged, but a certain amount of trouble was caused by the arrival of guns from Antwerp which fired "Black Marias," and the enfilade gun and machine-gun fire to which portions of the main line lent themselves. On the 21st September the 17th Infantry Brigade (Brig.-Gen. W. R. B. Doran) relieved the 6th Infantry Brigade and the 4th Guards Brigade on the front Fort de Metz-La Cour de Soupir, and held the portion without much incident till 2nd October, when they were withdrawn into Corps Reserve. The 16th Infantry Brigade (Brig.-Gen. E. C. Ingouville-Williams) relieved the 7th and 9th Infantry Brigades to the north-east of Vailly on the 21st/22nd September, and remained in trenches until 12th October, some time after the rest of the Division had gone north. They received the thanks of the II Corps for their soldierly conduct. The divisional artillery (Brig.-Gen. W. H. L. Paget) was in support of the 5th Division opposite Missy, but only the 2nd Brigade was engaged. It had already been re-organized since mobilization by the inclusion, in each of 12th, 24th and 38th Brigades, of a battery of 4.5-in. howitzers. The Battle of the Aisne marked the commencement of trench warfare, and the Royal Engineers (Lt.-Col. G. C. Kemp, C.R.E.) were employed to some extent in wiring at night. CHAPTER III MOVE TO THE NORTH AND FIRST BATTLE OF YPRES 1914