1865
- Enslaved people in Galveston, Texas are informed of the Emancipation Proclamation two years after it was put into effect, ending chattel slavery in the United States. The event is the basis for the Juneteenth holiday.
1891
- Anti-Fascist and Socialist activist and artist John Heartfield is born in Berlin, German Empire.
1896
- British Communist historian and Communist Party of Great Britain leader Rajani Palme Dutt is born.
1953
- Julius and Ethel Rosenberg are judicially murdered in Sing Sing Correctional Facility for their Communist views and alleged espionage on behalf of the Soviet Union.
1985
- During the Zona Rosa attack against imperialists in El Salvador is carried out by the Revolutionary Party of Central American Workers
2012
- Wikileaks founder and whistleblower Julian Assange is forced to request asylum at Ecuador's embassy in London after being threatened with extradition to the United States.