Not active duty or a vet, but have had a lot of family in the forces;

Their duty is to uphold the constitution and protect the nation ostensibly, so they’d be obligated to refuse an illegal order. Realistically you won’t see that play out amongst the rank and file in part due to the culture of ‘discipline’ in the US military, and also the reality of court martial/dishonourable discharge. If something like this did occur it would likely be the five and/or four star generals that make the call. Now you have two powerful factions at odds with potentially catastrophic results.

Either way there’s gonna be court martials.

That’s a pretty ‘fuck you, I got mine’ attitude

Aboriginal is mostly associated with Australia, but since this is a Canadian study I thought it would be helpful to link to the tribes there.

For North Americans the term most often heard in popular usage is ‘Indigenous’