Atlantic Command was a formation of the Canadian Army created during the Second World War to strengthen and administer home defence facilities on Canada's Atlantic Coast.

A second major function was to train reinforcements to be sent to the Canadian divisions in Europe.

6 (Prince Edward Island and Nova Scotia) with Military District No.

5 (the eastern part of the Province of Quebec bordering the Gulf of Saint Lawrence).

Extending the existing military cooperation among Canada, the Dominion of Newfoundland and the United Kingdom, Atlantic Command also controlled Canadian personnel stationed in Newfoundland.