Following are some of the major events to have occurred on April 21: 1910 – American novelist Mark Twain (Samuel Langhorne Clemens) died. His masterpieces “The Adventures of Tom Sawyer” and “The Adventures of Huckleberry Finn” were drawn from his boyhood experiences. 1918 – Baron Manfred von Richthofen, Germany’s top aviator in World War One, … Continue reading On This Day: A military coup in Athens established the regime of the “Greek Colonels”