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.
The consuls were ordered to resign before the expire of their year of office in order that the new consuls might be elected at an earlier date in view of such a formidable war.
There were religious difficulties in the way of the elections being held by those whose tenure of office had been curtailed, and so an interregnum commenced. There were two interreges, M. Valerius and M. Fabius. The latter elected T. Manlius Torquatus (for the third time) and P. Decius Mus as consuls.
It was in this year (341 B.C.), it appears, that Alexander, King of Epirus, landed in Italy, and there is no doubt that had he been fairly successful at first that war would have extended to Rome.