Defence Scheme No. 1

Defence Scheme No. 1
Date 1920s or 1930s Location Canada, United States and British West Indies Status Planned but never took place
Belligerents
United States	British Empire Canada  United Kingdom Newfoundland  Australia  New Zealand India

Defence Scheme No. 1 was a war plan 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.