The radio broadcast of "War of the Worlds" took place on this day in 1938. There's more in the September 17, 2012 episode of Stuff You Missed in History Class.

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Sir Walter Raleigh was beheaded on this day in 1618. You can learn more on the October 22, 2108 episode of Stuff You Missed in History Class.

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The Czechoslovak Republic, or Czechoslovakia, was proclaimed on this day in 1918.

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Missouri Executive Order 44, also known as the Extermination Order, was issued on this day in 1838.

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The Gunfight at the O.K. Corral took place on this day in 1881. There's more in the September 14, 2009 episode of Stuff You Missed in History Class.

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The SS Princess Sophia sank on this day in 1918.

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Ninety percent of Iceland's women went on strike in the Women's Day Off on this day in 1975.

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The War of Jenkin's Ear, known in Spain as Guerra del Asiento, began on this day in 1739.

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The Great Disappointment of the Millerites took place on this day in 1844.

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The first modern planetarium opened in Munich on this day in 1923.

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