Here’s a list of things the US military has actually done in the course of its history:

- invaded Canada
- killed Americans
- killed unarmed protesting Americans
- prosecuted wars of imperial conquest
- prosecuted wars of crass commercial interest
- fought wars that were blatantly illegal under international law
- killed civilians
- committed war crimes
- fought white people
- fought people who speak English

Here’s a list of things the US military has, to the best of my knowledge, never done:

- refused or been unable to prosecute an operation directed by a lawful authority

A lot of people resting their hopes on the idea that the US military would refuse en masse to carry out Trump’s orders to invade Canada or Greenland or wherever. But this is a fantasy version of the US military.