Concept

December 9

Summary
536 – Gothic War: The Byzantine general Belisarius enters Rome unopposed; the Gothic garrison flees the capital. 730 – Battle of Marj Ardabil: The Khazars annihilate an Umayyad army and kill its commander, al-Jarrah ibn Abdallah al-Hakami. 1432 – The first battle between the forces of Švitrigaila and Sigismund Kęstutaitis is fought near the town of Oszmiana (Ashmyany), launching the most active phase of the Lithuanian Civil War. 1531 – The Virgin of Guadalupe first appears to Juan Diego at Tepeyac, Mexico City. 1636 – The Qing dynasty of China, led by Emperor Hong Taiji, invades Joseon. 1688 – Glorious Revolution: Williamite forces defeat Jacobites at Battle of Reading, forcing James II to flee England. (Date is Old Style; the date in the New Style modern calendar is 19 December.) 1775 – American Revolutionary War: British troops and Loyalists, misinformed about Patriot militia strength, lose the Battle of Great Bridge, ending British rule in Virginia. 1822 – French physicist Augustin-Jean Fresnel, in a memoir read to the Academy of Sciences, coins the terms linear polarization, circular polarization, and elliptical polarization, and reports a direct refraction experiment verifying his theory that optical rotation is a form of birefringence. 1824 – Patriot forces led by General Antonio José de Sucre defeat a Royalist army in the Battle of Ayacucho, putting an end to the Peruvian War of Independence. 1835 – Texas Revolution: The Texian Army captures San Antonio following the Siege of Béxar. 1851 – The first YMCA in North America is established in Montreal. 1856 – The Iranian city of Bushehr surrenders to occupying British forces. 1861 – American Civil War: The Joint Committee on the Conduct of the War is established by Congress. 1868 – The first traffic lights are installed, outside the Palace of Westminster in London. Resembling railway signals, they use semaphore arms and are illuminated at night by red and green gas lamps. 1872 – In Louisiana, P. B. S. Pinchback becomes the first African American governor of a U.
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