1914
Garrisoned at Aldershot, it belonged to the British Expeditionnary Force which left to France in August. It made all the war within the 1st brigade of the 1st Division.
Retreat. Etreux, Iron, Villers Cotterêts, Coulommiers.
Battle of the Marne. Supported by the 1st Camerons, the battalion carried out an successful attack on 6 September near Sablonnières. Crossed the Marne at Nogent. Fère-en-Tardenois.
Battle of the Aisne. Vendresse. Chemin des Dames. The commanding officer, Lieutenant-Colonel G. Duff was killed during the fights in Chivy valley (14 September). Lost nearly 200 men.
Transfer in Flanders in October with the B.E.F.
First Battle of Ypres. (October-November) Gheluvelt. Polygon Wood. Menin Road. High losses. Givenchy (December).
1915
First combat of Givenchy (25 January). Lost 210 men.
Battle of Aubers.(9 May) The battalion attacked with the sound of the bagpipes . German trenches were infiltrated and cleared but must be evacuated faced with counter-attacks. On a strenght of 830 hommes only 360 were valid at the end of the combat. Corporal J. Ripley gaines a Victoria Cross at Rue du bois (south sector of the battle).
Battle of Loos.
1916
Battle of the Somme. Contalmaison (10-14 July) : lost about 150 men.
Several unsuccessful attacks against Intermediate Trench (near High Wood) from 16 to 18 August. Lost again 150 men.
Attack of the east corner of High Wood. Lost 200 men.
Sector of Flers : attack of Drop Alley (20 September), Goose Alley (25 September)
1917
Third Battle of Ypres. Passchendaele ridge (November).
1918
German Offensives. Givenchy.
September : attack of Hindenburg line.
Final advance.
