May 10 Ethan Allen demanding the surrender of Fort Ticonderoga 28 BC – Chinese astronomers during the Han dynasty made the first precisely dated observation of a sunspot. 1775 – American Revolutionary War: A small force of Patriots led by Ethan Allen and Benedict Arnold captured Fort Ticonderoga (depicted) in New York, without significant injury or incident. 1933 – Thousands of books on the history and healthcare of transgender people, taken from the Institute for Sexual Science, were burned by Nazis in Bebelplatz Square for being "un-German". 1940 – British prime minister Neville Chamberlain resigned and formally recommended Winston Churchill as his successor. 2005 – Vladimir Arutyunian attempted to assassinate U.S. president George W. Bush and Georgian president Mikheil Saakashvili in Tbilisi using a hand grenade, which failed to detonate. Leonhart Fuchs (d. 1566)Karl Barth (b. 1886)Arthur Kopit (b. 1937) More anniversaries: May 9 May 10 May 11 Archive By email List of days of the year About