And the Soviet Union.
Indeed. I reccomend some of these links if you have the time, the Chinese famine is also worthy of research.
Soviet Union and approximated numbers killed within. Also, the Chinese Famine. Here as well and also Here.
"Socialist Revolutions succeed only when rivers run red with blood, and blood has to be spilled if what you are aiming for is the perfectibility of the human race."
Greek Communist Ares Velouchiotes.