March 18:
A.D. 37: Tiberius' will is nullified by the Roman Senate, and Caligula is proclaimed heir.
A.D. 1123: The First Lateran Council opens in Rome.
A.D. 1314: Jacques de Molay, the last Grand Master of the Knights Templar is burned at the stake.
A.D. 1940: Benito Mussolini joins Germany's war against France and Britain.