Ukraine and Venezuela

Unless common decency is overriden by something like fear of a despot, a country's military and police may refuse to fire on their own people:

The heads of four Ukrainian security bodies, including the police's Berkut anti-riot units, appeared in parliament on Saturday and declared they would not take part in any conflict with the people.

They represented the paratroop unit of the military, the Berkut anti-riot police, Alfa special operations unit and military intelligence. The Interior Ministry had already signaled its allegiance to anti-government protests under a new minister from the ranks of the opposition.

Which explains why the Venezuelan regime allegedly is importing Cuban troops. (Though I'd like to know who supports the Venezuelan regime and why, given its incredible failure.)