December 20Russian and U.S. Implementation Force troops1852 Led by George Cathcart, British troops defeated Basuto and Taung forces at the Battle of Berea in present-day Lesotho, leading to an offer of peace from King MoshoeshoeI.1940 The superhero Captain America made his first published appearance in the comic book Captain America Comics#1.1980 NBC aired the American football match between the New York Jets and the Miami Dolphins without announcers.1995 Mandated by the Dayton Agreement that ended the Bosnian War, the NATO-led Implementation Force (troops pictured) began peacekeeping operations in Bosnia and Herzegovina.1999 Portugal transferred the sovereignty over Macau, which it had administered since the mid16th century, to China.Ambroise Par (d.1590)Jean Jannon (d.1658)Bill O'Reilly (b.1905)Elizabeth Kekaaniau (d.1928)More anniversaries: December 19December 20December 21ArchiveBy emailList of days of the yearAbout