 The British instigated a new offensive on 25 September , at Loos , to coincide with French offensives in the Champagne and Artois regions . The King 's were represented in the offensive by eight battalions , from standard infantry to pioneers . Some 150 tons of Chlorine gas was used on the first day of the battle , discharged via thousands of cylinders . Strong winds blew the gas backwards , hindering the advance of the 1st King 's and other units having to also contend with partially uncut barbed wire . The advance of the 1 / 9th King 's also stalled , though they took about 300 Germans prisoner . The battalion later assisted in the repulse of a German counter @-@ attack on 8 October . More battalions arrived before the year ended , including the 17th , 18th , 19th , and 20th Liverpool Pals , which formed the 89th Brigade , 30th Division . 
