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.
A sudden rush from the fields into the City was the first intimation of what was happening.
A war so close to their gates admitted of no delay, and Romulus hurriedly led out his army and encamped about a mile from Fidenae. Leaving a small detachment to guard the camp, he went forward with his whole force, and whilst one part were ordered to lie in ambush in a place overgrown with dense brushwood, he advanced with the larger part and the whole of the cavalry towards the city, and by riding up to the very gates in a disorderly and provocative manner he succeeded in drawing the enemy.