[1] The regiment mobilized the 3rd Battalion, The Stormont, Dundas and Glengarry Highlanders, CIC, CAOF on 1 June 1945 for service with the Canadian Army Occupation Force in Germany.

When the War of 1812 broke out in June 1812, the Militiamen from the area gathered to prevent an invasion of their homeland and the companies were formed into the various county militias.

[4] However, on the occasion of the bicentennial of the War of 1812 in 2012, the Government of Canada permitted Canadian regiments to perpetuate and officially commemorate 1812 militia and Fencible units thus awarding the Stormont, Dundas and Glengarry Highlanders three War of 1812 battle honours, including the battle honour NIAGARA which had been awarded to the Glengarry Light Infantry Fencibles.

[4] The 1855 Militia Act introduced voluntary service, and the United Counties raised many independent companies in 1862 following the Trent Affair.

An attack on Prescott and subsequent advance to Ottawa was prevented by the presence of a considerable force of volunteers from Dundas, Stormont, and Glengarry, and a British gunboat on the river.

[4] At the outbreak of the Great War, the regiment – in Highland dress since 1904 – guarded the St. Lawrence canals until December 1915, when the United Counties raised the 154th Battalion for the Canadian Expeditionary Force.

More than 100 members of the 59th Stormont and Glengarry Regiment were killed while serving with the CEF, including Claude Joseph Patrick Nunney, who won the Victoria Cross in 1918.

[4] The SD&G Highlanders landed in Normandy on D Day and was the first regiment to enter Caen, reaching the centre of the city at 1300 hours, July 9, 1944.

The Regiment fought across France via Rouen, Eu, Le Hamel and Boulogne, moved into the Netherlands and took part in the amphibious landing across the Savojaardsplaat, and advanced to Knokke by way of Breskens.

Altogether 3,342 officers and men served overseas with the SD&G Highlanders, of whom 278 were killed and 781 wounded; 74 decorations and 25 battle honours were awarded.

[4]In 1968, to mark the regiment's centenary, the Stormont, Dundas and Glengarry Highlanders received the Freedom of the City of Cornwall.

[3] Cpl Eric Monnin was awarded the Medal of Military Valour for his actions on 9 July 2010 in Kandahar Province, Afghanistan while serving with the 1st Battalion, The Royal Canadian Regiment.

[1] Cornwall Armoury; 505 Fourth Street East, Cornwall, Ontario K6H 2J7 Coordinates: 45°1′29″N 74°43′8″W / 45.02472°N 74.71889°W / 45.02472; -74.71889 The museum collects, preserves and exhibits military artifacts and archival material related to the Regiment and its predecessor units in the three counties of Stormont, Dundas and Glengarry as well as material related to the military experiences of the residents of the three counties.