1606
Guy Fawkes is put to death for his involvement in England’s infamous Gunpowder Plot.
1865
The U.S. House of Representatives approves the 13th Amendment, formally ending slavery in the United States.
1917
Germany reinstates unrestricted submarine warfare amid World War I, escalating naval conflict.
1950
President Harry Truman reveals that the United States has developed the hydrogen bomb.
1961
NASA sends Ham, the first chimpanzee in space, on a successful suborbital mission.
1990
Margaret Thatcher steps down as Prime Minister of the United Kingdom after more than a decade in office.
