The Eugenics Wars happened with a bunch of genetically modified super soldiers that were created through selective breeding. The term ‘Eugenics’ often just gets used as short hand within the Trek universe for all types of Genetic Modification in general as genetic modification is illegal in the Federation.
No? I just missed a step in my text a bit. My point was that while the US military is strong and could outright invade Canada with tanks and planes and guns… that isn’t how the war would actually be fought. It would instantly turn to guerilla warfare as normal citizens started weaponizing themselves, crossing into the United States, and being able to carry out attacks on American infrastructure while looking and sounding the same as Americans.
Canada can’t prepare a ton more than it already has but America can’t prepare at all. The infrastructure in America is way too vulnerable and any war with Canada would mean a destruction of American infrastructure carried out by people wearing not uniforms but a smile.