The regiment is headquartered in Bathurst, New Brunswick, with sub-units located in Newcastle (present day Miramichi), Campbellton and Moncton.

Details of the 73rd Northumberland Regiment were called out on active service on 6 August 1914 for local protective duty.

There it provided reinforcements for the Canadian Corps until 28 January 1917, when its personnel were absorbed by the 13th Reserve Battalion, CEF.

When it shipped overseas, it was initially stationed in Liverpool, after that it moved to Scotland near the castle of the Duke of Argyll.

[13][14] On July 4, 1944, the men of the North Shore Regiment participated in Operation Windsor, the attack on the Carpiquet airfield.

It helped clear the coast of France in late August and early September 1944, then it advanced into the Netherlands, taking part in the Battle of the Scheldt.

It fought in the Rhineland, the Hochwald, but then it doubled back to the Netherlands and conquered the Twente Canal, and liberated Zutphen where it met its most brutal urban fighting since Caen.

On 8 July 1944, it landed in France as a sub-unit of the 5th Field Regiment, RCA, 2nd Canadian Infantry Division, where it continued to fight in North-West Europe until the end of the war.

[17][18] (both awarded in commemoration of the New Brunswick Fencible Infantry (104th Regiment of Foot) Honorary distinction: The non-emblazonable honorary distinction Defence of Canada – 1812–1815 – Défense du Canada (partly awarded in commemoration of the New Brunswick Fencibles) The regiment did not contribute sufficient forces to meet the minimum level of 20 per cent of effective strength to qualify for the theatre honour “Afghanistan".