Wikipedia:Selected anniversaries/September 12

September 12: National Day in Cape Verde

1683 - Great Turkish War: Polish troops led by Jan III Sobieski (pictured) joined forces with a Habsburg army to defeat the Ottoman Empire at the Battle of Vienna.
1933 - Leó Szilárd, waiting for a red light on Southampton Row in Bloomsbury, conceived of the idea of the nuclear chain reaction.
1942 - The Laconia incident: A U-boat sank RMS Laconia with a torpedo off the coast of West Africa and attempted to rescue the passengers, which included some 80 civilians, 160 Polish and 268 British soldiers and about 1800 Italian POWs.
1977 - South African anti-apartheid activist Steve Biko was killed in police custody.
1992 - Abimael Guzmán, leader of the Peruvian Maoist guerrilla organization Shining Path, was captured in Lima.

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