Wikipedia:Selected anniversaries/May 12

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Eligible

 * 1846 – The Donner Party, an American pioneer group which became known for resorting to cannibalism when they became trapped in the Sierra Nevada, left Independence, Missouri, for California.
 * 1863 – American Civil War: The Confederates were routed in the Battle of Raymond, a small battle that had an inordinately large impact on the Vicksburg campaign.
 * 1881 – Under threat of invasion, Muhammad III as-Sadiq, Bey of Tunis, signed the Treaty of Bardo to make Tunisia a French protectorate.
 * 1888 – North Borneo was established as a British protectorate.
 * 1932 – Nazi deputies assaulted journalist Helmuth Klotz in the German parliament building after he broke the Röhm scandal.
 * 1941 – German engineer Konrad Zuse presented the Z3, the first working programmable and fully automatic computer, to an audience of scientists in Berlin.
 * 1967 – The Jimi Hendrix Experience released the critically acclaimed and widely influential debut album Are You Experienced.
 * 1975 – The Cambodian navy seized the American container ship SS Mayaguez in what they claimed to be Cambodian territorial waters.
 * 1982 – The Coppergate Helmet (pictured), the best preserved of the six known Anglo-Saxon helmets, was discovered.
 * 1982 – Juan María Fernández y Krohn attempted to assassinate Pope John Paul II with a bayonet in Fátima, Portugal.
 * 2008 – In Postville, Iowa, U.S. Immigration and Customs Enforcement conducted the largest-ever raid of a workplace and arrested nearly 400 immigrants for identity theft and document fraud.
 * Born/died this day: | Æthelhard |d|805| Fergus of Galloway |d|1161| Pompeo Colonna |b|1479| Johann Baptist Wanhal |b|1739| Rachel Chiesley, Lady Grange |d|1745| Justus von Liebig |b|1803| Charles Holden |b|1875| Katharine Hepburn |b|1907| Alexander Esenin-Volpin |b|1924| Yogi Berra |b|1925| Maryam Mirzakhani |b|1977| Malin Åkerman |b|1978| Benjamin Sheares |d|1981