Thelex Vatinia (probably passed in May or early June 59 BC)[1][2][3] also known as thelex Vatinia de provincia Caesaris[4] or thelex Vatinia de imperio Caesaris,[5] was legislation which gaveGaius Julius Caesar governorship of the provinces ofCisalpine Gaul andIllyricum for five years.[6][7][3] It was named after and proposed, in theTribal Assembly, byplebeian tribunePublius Vatinius.[8] Along with the provinces, it also gave him the three legions already present there and the privilege of naming his own legates.[9] Caesar also receivedTitus Labienus aslegatus cum imperio in the law; Labienus' appointment may have been, according to Syme, a sign of friendship betweenPompey and Caesar.[10]
Caesar seemed to want to use the law to prepare for a war of choice against the kingdom of Dacia.[11] However, after the unexpected death of the governor ofTransalpine Gaul, and at the proposal of Pompey andPiso,[6] the senate also added to Caesar's assigned provinces the further Gaul as well, giving him another legion.[8] According to Cicero and Suetonius, the senate's assignment was done out of fear that if they did not do so, a tribune would introduce and the people would pass further legislation assigning the province as well.[12]
The army assigned to Caesar in Cisalpine Gaul and the provinces close to it would prove both useful inCaesar's civil war and, in the immediate term, for the protection of Caesar's legislative programme against repeal.[13] The law – importantly – gave Caesar, as governor of the provinces, a chance to show his martial quality with great potential for military glory. To that end, he campaigned extensively in Germany, Britain, and Gaul; the selection of the provinces also helped in that the provincial populations were flush with Roman citizens who could be recruited for Caesar's campaigns.[8]
Caesar's position in Transalpine Gaul was annually reviewed by the senate.[14] When the five year term expired, Caesar met with Pompey, Crassus, and others at the so-calledLuca Conference where they renewed their political alliance and pushed through legislation to extend Caesar's Gallic commands in their entirety.[15]
The granting of aproconsulship in Gaul also gave Caesar legal immunity against prosecution by his political enemies and a number of armies.[16] While Caesar did not appear to desire a war against his countrymen upon hisprorogationpro consule to Gaul and Illyricum, the followingGallic Wars and his subsequent personal popularity, led to a confrontation with the senate and Caesar's decision togo to war to protect his personal interests.[16][17][18]
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