Suetonius (70 AD - 126 AD)
The Twelve Caesars
Vol. I, 1, CAESAR, XXX
But when the senate declined to interfere, and his opponents declared that they would accept no compromise in a matter affecting the public welfare, he [Caesar] crossed to Hither Gaul, and after holding all the assizes, halted at Ravenna, intending to resort to war if the senate took any drastic action against the tribunes of the commons who interposed vetoes in his behalf.
Vol. I, 2, AUGUSTUS, XLIX
With respect to the army, he distributed the legions and auxiliary troops throughout the several provinces, he [Augustus] stationed a fleet at Misenum, and another at Ravenna, for the protection of the Upper and Lower Seas.