Wikipedia:Selected anniversaries/May 12

This is a list of selected May 12 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.

Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article, featured list or picture of the day.

To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.

← May 11	May 13 →

Staging area

Images

Use only ONE image at a time

• 
  George VI of the United Kingdom
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  Coat of Arms of the National University of San Marcos
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  The Duke of Guise during the Day of the Barricades
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  NORAD
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  Replica of the Z3
• Konrad Zuse in 1992 (requires undeletion)
  Konrad Zuse in 1992 (requires undeletion)
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  Konrad Zuse in 1992
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  Muhammad III as-Sadiq, the Bey of Tunis
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  Semyon Timoshenko
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  Roald Amundsen's airship Norge
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  SS Mayaguez under attack
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  Sagittarius A* imaged by the Event Horizon Telescope in 2017, released in May 12, 2022

Ineligible

Blurb	Reason
International Nurses Day;	refimprove
907 – Zhu Wen forced Emperor Ai to abdicate, ending the Tang dynasty after nearly three centuries of ruling China.	Date not in source and Tang Dynasty article says abdication 1 June
1364 – King Casimir III of Poland issued a royal charter to establish Jagiellonian University, the nation's oldest university.	alumni list
1510 – Zhu Zhifan, the Prince of Anhua (in modern Shaanxi, China), began an unsuccessful rebellion against the reign of the Zhengde Emperor.	Six "page range too broad" tags
1551 – The National University of San Marcos, the oldest university in the Americas, was founded in Lima, Peru.	refimprove section
1588 – Catholic Parisians under Henry I, Duke of Guise, protested the moderate policies of Henry III of France.	Too much uncited for a short article
1865 – In the last major clash of arms of the American Civil War, the Union Army engaged the Confederates along the banks of the Rio Grande east of Brownsville, Texas.	refimprove section
1885 – The Provisional Government of Saskatchewan was decisively defeated at the Battle of Batoche, which led to the end of the North-West Rebellion three days later.	refimprove section
1926 – The crew of the airship Norge, led by Roald Amundsen, became the first people to make a verified trip to the North Pole.	unreferenced section
1926 – The Trades Union Congress, a federation of British trade unions, announced that it would end its week-long general strike "in defence of [coal] miners' wages and hours".	needs more footnotes
1942 – World War II: Soviet forces under Marshal Semyon Timoshenko launched a major offensive in eastern Ukraine, but were encircled and destroyed by German troops two weeks later.	non-indept sources, participant memoirs taken as fact
1958 – Canada and the United States signed a formal agreement establishing the North American Air Defense Command to provide aerospace warning and defense for North America.	refimprove section
2006 – A cartoon that allegedly compared Iranian Azeris to cockroaches was published in a magazine, sparking riots throughout the country.	unreferenced section
2008 – An earthquake registering approximately 8.0 Ms struck the Chinese province of Sichuan, killing at least 69,000 people, injuring at least 374,000, and leaving at least 4.8 million others homeless.	refimprove section
2010 – On arrival at Tripoli International Airport, Afriqiyah Airways Flight 771 crashed into the ground at a speed of 262 kn (485 km/h; 302 mph) and exploded, killing all but one of the 304 people on board.	needs rewrite
Murad Mirza |d|1599	date of death not referenced, and I can't find any sources beyond "May 1599"

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

Notes

• Benty Grange helmet appears on May 3, so Coppergate helmet should not appear in the same year
• Beatification of Pope John Paul II appears on May 9 and Attempted assassination of Pope John Paul II appears on May 13, so Juan María Fernández y Krohn should not appear in the same year

May 12

B-17 bombers intercepting the Rex

• 1743 – War of the Austrian Succession: Habsburg ruler Maria Theresa was crowned Queen of Bohemia after Austrian forces drove French troops from the territory.
• 1938 – During an exercise to demonstrate air power, United States Army Air Corps bomber aircraft intercepted the Italian ocean liner SS Rex (pictured) 620 nautical miles (1,100 km) off the US Atlantic coast.
• 1948 – The United Kingdom publicly announced that it was independently developing nuclear weapons, after the US Atomic Energy Act of 1946 ended cooperation on the matter.
• 1968 – Vietnam War: The 1st Australian Task Force began the defence of Fire Support Base Coral in the largest unit-level action of the war for the Australian Army.
• 1998 – Four students were shot and killed by Indonesian soldiers at Trisakti University in Jakarta, which led to widespread riots and the resignation of President Suharto nine days later.

• Thomas Palaiologos (d. 1465)
• Otto Frank (b. 1889)
• Moto Hagio (b. 1949)

More anniversaries:

• May 11
• May 12
• May 13