March 21 (UPI) -- On this date in history: In 1413, Henry V was crowned king of England. In 1617, Pocahontas died in England at about age 22. Three years earlier, she converted to Christianity, took the name Rebecca and married Englishman John Rolfe. In 1790, Thomas Jefferson of Virginia became the first U.S. secretary of state. In 1857, 100,000 people were killed in an earthquake in Tokyo. In 1945, 7,000 Allied planes dropped more than 12,000 tons of explosives on Germany during a single World