For the first time in over 100 years, the Canadian military is modeling its response to a hypothetical U.S. invasion, as tensions rise between President Donald Trump’s administration and NATO allies, according to a new report.

The model outlines the Canadian Armed Forces’ multi-pronged strategy to counter a potential U.S. military incursion. It includes plans to use asymmetric tactics, drone warfare and requests for European backup, according to two senior Canadian officials who spoke to The Globe and Mail.