Loos, an artillery barrage caught them, causing many casualties among the Guards. The following day, the 2nd Guards Brigade (1st Battalion) attacked a position known as Puits 14 bis, and in the process, suffered very heavy casualties, forcing the brigade to halt the attack. Both battalions continued to experience heavy fighting throughout September, and into October, and by the end of the Battle of Loos, the regiment had suffered over 500 casualties. On 1 July 1916, the first Battle of the Somme began, and on the very first day of the offensive, over 57,000 British soldiers became casualties. In September, the Scots Guards got involved in the Somme Offensive for the first, taking part in the subsidiary Battle of Flers–Courcelette, which saw the first introduction of the tank, and at another subsidiary battle, at Morval, where the Guards captured Lesboeufs. On 15 July, Lance-Sergeant Frederick McNess of the 1st Battalion, led a bombing party under very heavy shell and machine-gun fire. The party successfully reached the first enemy trench but found the left flank to be exposed, and the enemy were lobbing bombs. Sergeant McNess duly led a counter-attack, being badly wounded in the jaw and neck in the process. Despite the severe wounds the Sergeant subsequently made a 'block', encouraged his men and continued to throw grenades until eventually succumbing to the loss of blood. In July 1917, the regiment began its involvement in the Third Battle of Ypres, which lasted into November. The regiment took part in the subsidiary engagements at Pilckem, Menin Road, Poelcapelle, Passchendaele, experiencing very severe fighting which saw the British suffer very heavy casualties against stiff German defenders in terrible fighting conditions. In November, the regiment took part in the Battle of Cambrai (1917), most famous for the first large-scale use of British tanks, eventually 476 tanks in total, in battle. On 27 November, Sergeant John McAulay, of the 1st Battalion, assumed command of his company after all its officers had become casualties, and under heavy shell and machine-gun fire, the company held and consolidated the company's gained objectives. The Sergeant subsequently reorganised the company and upon noticing a counter-attack developing, he successfully repulsed it by skillfully exploiting machine-guns to his advantage to inflict very heavy casualties on the German attackers. Sergeant McAulay also carried a considerable distance to a safer location, while under heavy fire, the mortally wounded company commander. He performed valiantly