When did the roman republic form?
According to tradition, the Roman Republic was founded by Lucius Junius Brutus in 509 B.C.E after the expulsion of the last kind of Rome, Tarquinius Superbus. For more information, see Book One of Livy’s History of Rome, which describes the traditional story believed by ancient Romans: http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext%3a1999.02.