[1][2][3] The Canadian Expeditionary Force was a separate entity created in 1914 by Canada's Minister of Militia Sir Sam Hughes for service to Britain in the First World War.

Technically distinct from the standing land forces in existence at the time, soldiers were legally attested into the CEF in order to serve overseas.

The 10th Battalion by this point, after suffering heavily in its counter-attacks of 22–23 April, mustered only 174 men but still contributed enough to the defence of the position to merit a battle honour for their work.

The 10th Battalion was called forward on the night of 22–23 April to counterattack the strong German formation advancing through a large gap in the line created by the rout of two French divisions.

The assault cost the life of the 10th's commanding officer, Lieutenant-Colonel Boyle, and of the 816 men who crossed the start line on 22 April, only some 193 survived.

This action moved the overall commander of the French Army to describe the attack as the single bravest act of the entire war.

Festubert, 1915: Fought 20 kilometres north of Vimy, France, this unsuccessful attempt to capture K5, a small hill, was stopped short with heavy losses due to wet terrain, strong German defences, and little time to prepare.

Mount Sorrel: Another unsuccessful assault, this counter-attack by the 10th Battalion was launched on a small knoll in the Ypres Salient on 3 June 1916.

Despite the relatively low height of this feature, it provided an excellent viewpoint over the otherwise flat terrain in the area and was of considerable strategic importance.

The 10th Battalion was involved in a series of operations from 8 September and 17 October, primarily defensive actions which were successful, north of Albert, France near the town of Boiselle.

Ancre Heights: Another successful defensive battle fought by the 10th Battalion, during the Somme Campaign, near the town of Albert, France.

The British and French had been unable to clear these heights since the Germans first seized them in 1914, and had lost more men in the process of trying than the Canadians as a whole started out with on 9 April.

The battalion was not scheduled to attack, but the CO wisely prepared his soldiers as if they would be making the main assault—a decision that paid dividends when the unit was called out of reserve.

Consisting of a series of battles fought from August to September 1918, it signalled the beginning of the end of the war on the Western Front.

The 10th Battalion entered the newly captured city during the war's last days, when it was a prime objective for the British Army seeking revenge, and were there when the Armistice was declared.

The battalion remained in existence on paper into 1920, until the Otter Commission resolved the question of how to perpetuate the CEF in the postwar army.

The thorny problem of who would lay claim to the traditions of the 10th Battalion was solved by permitting a dual perpetuation by The Calgary Highlanders and The Winnipeg Light Infantry, whose predecessors had contributed men to the initial drafts that created the 10th in 1914.