Ab urbe condita

Titus Livius (Livy)

Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.

But the invasion of their country by an enormous army of Gauls —the last thing they were expecting —turned them for a time from their purpose.