With Canada under Carney’s rule, wargaming with a hypothetical US invasion scenario- other than the perpetual 19th-century concern of a US invasion of British colonial Canada- there was Defence Scheme No. 1 created on April 12, 1921, for an invasion of the US.
The plan was created by Canadian Director of Military Operations and Intelligence Lieutenant Colonel James Buster Sutherland Brown, for a Canadian pre-emptive attack against the United States in the (hypothetical) case of a conflict between the United States and the British Empire.
The Canadian side included the British Empire, i.e. Canada, India, the United Kingdom, Australia, New Zealand and Newfoundland. (Newfoundland was not part of the Dominion of Canada at the time)
‘Defence Scheme No. 1… detailed a surprise invasion of the northern United States as soon as possible after evidence was received of a US invasion of Canada. It assumed that the US would first attempt to capture Montreal and Ottawa and then Hamilton, Toronto, the Prairie Provinces, and Vancouver and the rest of Southwestern British Columbia. Defence Scheme No. 1’s US counterpart was War Plan Red, a plan to invade Canada as part of a war with Britain that was created in 1930.
The purpose of invading the US was to allow time for Canada to prepare its war effort and to receive aid from Britain. According to the plan, Canadian flying columns stationed in Pacific Command in western Canada would immediately be sent to seize Seattle, Spokane, and Portland. Troops stationed in Prairie Command would attack Fargo and Great Falls, then advance towards Minneapolis. Troops from Quebec would be sent to seize Albany in a surprise counterattack while troops from the Maritime Provinces would invade Maine. When resistance grew, the Canadian soldiers would retreat to their own borders, destroying bridges and railways to delay US military pursuit.’ See: https://en.wikipedia.org/wiki/Defence_Scheme_No._1
💥 Meanwhile in the US:
‘War Plan Red, also known as the Atlantic Strategic War Plan, was one of the color-coded war plans created by the United States Department of War during the interwar period of 1918–1939, covering scenarios related to a hypothetical war with the British Empire (the Red forces, likely in reference to the Red Ensign and red coat). ‘
See: https://en.wikipedia.org/wiki/War_Plan_Red
Also see: BBC news — ‘Why Canada is wargaming a (long shot) US invasion’: https://lnkd.in/p/gPQ4HX5M
–RdM
Substack: https://roycedemelo.substack.com/p/canada-planning-for-war-with-the
LinkedIn: https://lnkd.in/p/gH4fr6zC