Black January was a violent crackdown on a civilian population of Baku on 19–20 January 1990, pursuant to a state of emergency during the dissolution of the Soviet Union. General Secretary of the Soviet Communist Party Mikhail Gorbachev and Defence Minister Dmitry Yazov asserted that military law was necessary to thwart efforts by the Azerbaijani independence movement to overthrow the Soviet Azerbaijani government. According to official estimates 147 Azerbaijani civilians were killed, 800 people were injured and five people went missing. However unofficial number put the number of victims at 300 dead. Later on, in 1995 Gorbachev apologised to Azerbaijan by stating: "The declaration of a state emergency in Baku was the biggest mistake of my political career."
In a resolution of 22 January 1990, the Supreme Soviet of Azerbaijan SSR declared that the decree of the Presidium of the Supreme Soviet of the USSR of 19 January, used to impose emergency rule in Baku and military deployment, constituted an act of aggression. Black January is seen as the rebirth of the Azerbaijan Republic.