The Canadian Armed Forces have modelled a hypothetical U.S. military invasion of Canada and the country’s potential response, which includes tactics similar to those employed against Russia and later U.S.-led forces in Afghanistan, two senior government officials say.

It is believed to be the first time in a century that the Canadian Armed Forces have created a model of an American assault on this country, a founding member of the North Atlantic Treaty Organization and a partner with the U.S. in continental air defence.

A military model is a conceptual and theoretical framework, not a military plan, which is an actionable and step-by-step directive for executing operations.

The Globe and Mail is not identifying the officials, who were not authorized to discuss the military’s thinking on this matter publicly. The officials, as well as a number of experts, say it is unlikely the Trump administration would order an invasion of Canada.