This became known as the October Revolution in order to distinguish it from the revolution that had overthrown the Czar the previous February. In the October revolution, two people were killed while the revolutionaries were capturing the Winter Palace, where the Provisional Government met. By the evening of October 26, it was clear just how provisional the government had been.
On August 21, 1991, eight leaders of the tattered remnants of the Communist Party of the Soviet Union launched a coup against the government of Communist Mikhail Gorbachev. They had placed him under house arrest at his dacha 900 miles away. Boris Yeltsin was visibly in charge of the existing government at what was known as the White House: the parliament building. The Communists sent in troops to remove him and his supporters. Thousands of citizens then lined up to resist the troops. The troops refused to fire on them. That ended the Communist Party's power. Three civilians were killed by armored personnel carriers.
A total of five people were killed at the beginning and the end of the Bolshevik revolution. In between, Lenin and Stalin (mainly Stalin) executed or starved at least 15 million people, according to the 2007 edition of Robert Conquest's 1968 book, The Great Terror. Conquest had initially estimated 20 million. We will never know for sure, he said in 2007.