See Adrian Goldsworthy (2008). Caesar: Life of a Colossus, New Haven, CT:Yale University Press (9780300126891, p. 164, and Suetonius [Gaius Suetonius Tranquillus]| (2003). The Twelve Caesars, with an introduction by Michael Grant [Robert Graves, Transl.], Rev. Ed. London, UK:Penguin Books, p. 21 (0140449213), [1], accessed 18 April 2015.
The First lasted from approximately 59 BC to Crassus' defeat by the Parthians in 53 BC. See Arnold Joseph Toynbee (2014). "Julius Caesar (Roman ruler): The first triumvirate and the conquest of Gaul," and "Julius Caesar (Roman ruler): Antecedents and outcome of the civil war of 49–45 BC," at Encyclopædia Britannica (online), [2] and [3], accessed 18 April 2015.
