Long Branch Arsenal

Long Branch Arsenal. It was a major Small arms manufacturing facility established during the Second World War to address critical shortages in Commonwealth military equipment. Operated under the auspices of the Department of Munitions and Supply, the arsenal became a cornerstone of Canada's wartime industrial effort, producing hundreds of thousands of rifles and submachine guns. Its rapid construction and high-volume output were emblematic of the nation's mobilization for total war.

History

The arsenal's genesis lay in the dire equipment shortages faced by the British Army following the Battle of France and the Dunkirk evacuation, which spurred the British government to seek production capacity within the Dominions. In 1940, the Canadian Cabinet approved its construction on a site in the Lakeshore area, selected for its proximity to Toronto's industrial base and transportation networks like the Canadian National Railway. Under the leadership of C.D. Howe, the powerful minister of the Department of Munitions and Supply, the facility was built with remarkable speed, with production commencing within a year. Throughout the war, it operated as a crown-owned plant managed by private industry, primarily John Inglis and Company, which also ran the nearby Bren gun factory in Toronto.

Operations and production

The arsenal functioned as a high-volume, precision manufacturing center, utilizing Assembly line techniques and a workforce that grew to over 5,000, including a significant number of women in roles traditionally held by men. Its primary mission was the production of the Lee–Enfield No. 4 Mk I rifle, a standard-issue Infantry weapon for British and Commonwealth forces. It also manufactured the Sten submachine gun, a simple and inexpensive weapon crucial for arming resistance groups and airborne troops. Production figures were substantial, with the plant ultimately delivering over 900,000 Lee–Enfield rifles and several hundred thousand Sten guns, supplying not only Canadian units but also forces under British Command and other Allied nations.

Facilities and layout

The sprawling complex was situated on a large tract of land near the shore of Lake Ontario, designed for both efficiency and security. It featured numerous long, single-story buildings housing dedicated workshops for Machining, Forging, Woodworking, and final assembly, laid out in a logical production sequence. The site included its own Power station and Water treatment facilities to ensure uninterrupted operations, as well as extensive testing ranges for proof-firing and accuracy verification. Administrative offices, quality control laboratories, and warehouses for raw materials like Steel and Walnut were integral to the layout, creating a largely self-contained industrial community that operated around the clock.

Notable firearms

The most iconic weapon produced was the Lee–Enfield No. 4 Mk I rifle, known for its robustness and accuracy, which saw extensive use in campaigns from the Italian Campaign to the Northwest Europe campaign. The arsenal also produced the Sten Mk II submachine gun, a weapon distributed widely to French Resistance fighters and used in operations like the Dieppe Raid. While not a design originator, the plant's output was critical in standardizing armaments across the Empire, and some rifles produced here were later used in the Korean War and by other nations within the NATO alliance during the early Cold War.

Closure and legacy

With the end of the Second World War, the immediate need for the arsenal evaporated, and it was officially closed in 1945. The Government of Canada sold the buildings and land, with much of the site eventually being redeveloped for residential and light industrial use, absorbed into the expanding Etobicoke municipality (later part of Toronto). The arsenal's legacy is one of monumental industrial achievement, having been one of the largest small arms producers in Canadian history and a key node in the Imperial supply chain. Its success demonstrated Canada's capacity for sophisticated mass production and contributed significantly to the nation's military history and wartime economic transformation.

Category:Military installations in Ontario Category:World War II industrial sites Category:Military history of Canada during World War II