If the wind was favourable the attacks of the Second Division and of the Meerut Division were to be preceded by gas and smoke. The Lahore and Nineteenth Divisions were to assist with smoke barrages. The Lahore Division was directed to put up a smoke barrage on the southern flank of the Meerut Division. The Meerut Division was to arrange a similar barrage on its northern flank. A mine was to be exploded under a designated enemy salient two minutes before gas was turned on. The attack was to be preceded by a four days’ deliberate bombardment by the Meerut Divisional Artillery, reinforced by No. 4 Group, H.A.R., one Brigade R.F.A., from Lahore Division, one 3-pr. Hotchkiss gun on trailer, and an armoured train. The assault was to be supported by the above Artillery, and was to be carried out by the Garhwal Brigade on the right, with the Bareilly Brigade on the left; the Dehra Dun Brigade in Divisional reserve. The troops were to be formed up by midnight 24th-25th September. _Garhwal Brigade._—Three assaulting battalions (3rd Gurkha Rifles on the right, Leicesters in the centre, and 8th Gurkha Rifles on the left) from Sunken Street to sixty yards north of South Moated Grange Street. One battalion (1/3rd Londons) on the front line from Duck’s Bill to Sunken Street. Garhwal Rifles in the Home Counties Trench. _Bareilly Brigade._—Three assaulting battalions (1/4th Black Watch on the right, 69th Punjabis in the centre, and 2nd Black Watch on the left) from sixty yards north of South Moated Grange Street to Winchester Street. The 33rd Punjabis were in the Home Counties Trench, etc. The 58th Rifles were in Tilleloy trench. _Dehra Dun Brigade._—In Divisional reserve. One battalion (2nd Gurkha Rifles) south of Moated Grange Street. The 1st Seaforths north of Moated Grange Street. 1/4th Seaforths in Rouge Croix East Post, etc. The 9th Gurkhas in Min and Rugby Posts and in Bacquerot Street. The 93rd Burma Infantry in Carter’s Post. Owing to the uncertainty whether atmospheric conditions would admit of gas being used, two programmes for the assault were drawn up. _Programme “A.”_—To be followed if gas and smoke were to be employed. _Programme “B.”_—To be followed if gas and smoke were not to be employed. In both programmes the first objective of all assaulting battalions was the enemy’s front and support lines. As soon as the assault began, troops were to move up to replace those who had gone forward, the Divisional reserve going to Home Counties Trench, etc. This reserve was not to move farther forward without the orders of the Division. Three companies 34th Pioneers and half of the 20th Company Sappers and Miners were placed at the disposal of Meerut Division for the first day of the operations.