In 49 B.C., Julius Caesar crossed the Rubicon, beginning the Roman civil war.
In 1776, Common Sense by political philosopher Thomas Paine was published. The pamphlet advocated American independence from England.
In 1861, Florida seceded from the United States.
In 1878, a constitutional amendment that would give women the right to vote was introduced into the U.S. Senate. It wasn't until 42 years later that the amendment was signed into law.
In 1901, oil was discovered at the Spindletop claim near Beaumont, Texas, launching the Southwest oil boom.
In 1920, the League of Nations came into being as the Treaty of Versailles went into effect.
In 1929, The Adventures of Tintin comic book first published.
In 1946, the first meeting of the U.N. General Assembly convened in London.
In 1984, the United States established full diplomatic relations with the Vatican for the first time in 116 years.
In 1996, rebels in the Russian republic of Chechnya holding 2,000 rebels released all but 130 and were allowed to flee. However, before they reached the border, Russian troops attacked the convoy, beginning a five-day standoff.