Wikipedia:Selected anniversaries/April 10

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 * 1221 — A Mongol army commanded by Tolui captured the city of Merv in present-day Turkmenistan, allegedly killing more than 1.7 million people.
 * 1724 Bach leads the first performance of his cantata Erfreut euch, ihr Herzen, BWV 66, his first cantata composed for Easter in Leipzig.
 * 1741 – War of the Austrian Succession: Prussian forces defeated Austrian troops at the Battle of Mollwitz in present-day Małujowice, Poland, cementing Frederick II's authority over the newly conquered territory of Silesia.
 * 1815 – Mount Tambora in Indonesia began the most powerful volcanic eruption in recorded history, killing at least 71,000 people and affecting temperatures worldwide.
 * 1858 – Big Ben, the bell in the Palace of Westminster's clock tower in London, was cast after the original bell cracked during testing.
 * 1919 – Mexican Revolution leader Emiliano Zapata (pictured) was shot to death near Ciudad Ayala, Morelos.
 * 1944 – The Holocaust: Slovak Jewish prisoners Rudolf Vrba and Alfréd Wetzler escaped from Auschwitz, later publishing a report that became one of the earliest and most detailed descriptions of the camp's mass killings.
 * 1963 – The U.S. Navy nuclear submarine USS Thresher (SSN-593) sank with all hands lost during deep-diving tests in the North Atlantic Ocean.
 * 1992 – First Nagorno-Karabakh War: Dozens of Armenian civilians were massacred in the village of Maraga by Azerbaijani forces.
 * Born/died: | Michael Tarchaniota Marullus |d|1500| Thomas Jones |d|1619| Wilhelm Egon von Fürstenberg |d|1704| Samuel Hahnemann |b|1755| Giovanni Aldini |b|1762| Kishori Amonkar |b|1932| Carol V. Robinson |b|1956| Carole Goble |b|1961| Stu Sutcliffe |d|1962| Evelyn Waugh |d|1966

April 10: Eid al-Fitr (Islam, 2024)


 * 1809 – Napoleonic Wars: The War of the Fifth Coalition began with the Austrian invasion of Bavaria, then a client state of France.
 * 1925 – The novel The Great Gatsby by American author F. Scott Fitzgerald was first published by Scribner's.
 * 1970 – In the midst of business disagreements with his bandmates, Paul McCartney announced his departure from the Beatles.
 * 1973 – In the deadliest aviation accident in Swiss history, Invicta International Airlines Flight 435 crashed into a hillside near Hochwald, killing 108 people of 145 on board.
 * 2019 – Scientists from the Event Horizon Telescope project released the first image of a black hole (depicted), located at the center of the galaxy M87.