Some Notable Events that happened on October 30th Include:
- 30 B.C. - The Battle of Actium, between the forces of Octavian and Mark Antony, ends with Antony and Cleopatra's defeat.
- 1343 - The siege of Algeciras begins
- 1517 - Martin Luther posts his 95 theses, initiating the Protestant Reformation.
- 1648 - The Peace of Westphalia is signed, ending the Thirty Years' War.
- 1775 - John Murray, the 4th Earl of Dunmore, declares martial law and issues a proclamation freeing slaves who join the British Army.
- 1824 - The first edition of Webster's American Dictionary of the English Language is published.
- 1857 - "Oneida Community Mansion House", the communal living residence of the Oneida Community, burns to the ground.
- 1864 - The Battle of Franklin begins in Tennessee during the American Civil War.
- 1870 - The first commercial fish canning factory opens in Astoria, Oregon.
- 1872 - Susan B. Anthony is arrested for voting in the U.S. presidential election.
- 1895 - The Lumière Brothers hold their first public screening of motion pictures in Paris.
- 1905 - Tsar Nicholas II of Russia issues the October Manifesto, promising political reforms and civil liberties.
- 1922 - Benito Mussolini becomes prime minister of Italy, marking the beginning of Fascist rule.
- 1938 - The War of the Worlds, Orson Welles' radio adaptation of H.G. Welles' novel, airs in the U.S., causing widespread panic.
- 1961 - The Soviet Union detonates the most powerful nuclear weapon ever tested, the Tsar Bomba, over the Arctic Ocean.
- 1974 - Muhammad Ali defeats George Foreman in "The Rumble in the Jungle" in Kinshasa, Zaire.
- 1980 - The United Nations General Assembly adopts a resolution calling for the independence of Namibia.
- 1991 - The Madrid Conference opens, marking the start of peace negotiations between Israel and the Palestinians.
- 2005 - The International Space Station is completed with the arrival of the European Space Agency's Automated Transfer Vehicle ATV-1 "Jules Verne".
- 2011 - The Occupy Wall Street protests begin in New York City.
- 2015 - The Volkswagen emissions scandal becomes public after the U.S. Environmental Protection Agency (EPA) accuses Volkswagen of using software to cheat on emission tests.
- 2018 - The James Webb Space Telescope is launched from the European Spaceport in Kourou, French Guiana.