This is exactly what they're doing now, they're just doing it with law enforcement agencies and not military. Military is honestly going to be worse at all of this, as they don't have the investigative capacity. This also ducks the very thorny political problems where Ukraine (never mind Russia!)are NOT going to allow US military involvement in domestic affairs, but do have agreements with Interpol that make this possible. Nobody wants extrajudicial military extraction squads acting on their turf.

I'm sure the various 3 letter agencies (NSA, CIA, etc) are already involved to a degree that's not publicly known.