502 – Chinese emperor Xiao Yan names Xiao Tong his heir designate. 640 – Pope John IV is elected, several months after his predecessor's death. 759 – Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di. 1144 – The capital of the crusader County of Edessa falls to Imad ad-Din Zengi, the atabeg of Mosul and Aleppo. 1294 – Pope Boniface VIII is elected, replacing St. Celestine V, who had resigned. 1500 – A joint Venetian–Spanish fleet captures the Castle of St. George on the island of Cephalonia. 1737 – The Marathas defeat the combined forces of the Mughal Empire, Rajputs of Jaipur, Nizam of Hyderabad, Nawab of Awadh and Nawab of Bengal in the Battle of Bhopal. 1777 – Kiritimati, also called Christmas Island, is discovered by James Cook. 1800 – The Plot of the rue Saint-Nicaise fails to kill Napoleon Bonaparte. 1814 – Representatives of the United Kingdom and the United States sign the Treaty of Ghent, ending the War of 1812. 1818 – The first performance of "Silent Night" takes place in the church of St. Nikolaus in Oberndorf, Austria. 1826 – The Eggnog Riot at the United States Military Academy begins that night, wrapping up the following morning. 1846 – British acquired Labuan from the Sultanate of Brunei for Great Britain. 1865 – Jonathan Shank and Barry Ownby form The Ku Klux Klan. 1868 – The Greek Presidential Guard is established as the royal escort by King George I. 1871 – The opera Aida premieres in Cairo, Egypt. 1906 – Reginald Fessenden transmits the first radio broadcast; consisting of a poetry reading, a violin solo, and a speech. 1913 – The Italian Hall disaster in Calumet, Michigan results in the deaths of 73 striking workers families at a Christmas party participants (including 59 children) when someone falsely yells "fire". 1914 – World War I: The "Christmas truce" begins. 1918 – Region of Međimurje is captured by the Kingdom of Serbs, Croats and Slovenes from Hungary. 1920 – Gabriele D'Annunzio surrendered the Italian Regency of Carnaro in the city of Fiume to Italian Armed Forces.