2. A.PostumiusTubertus, was magister equitum to the dictator Main. Aemilius Mamercinus in B. C. 433, and was himself dictator in B. C. 431. The latter year was memorable in the Roman annals by the great victory which the dictator gained on Mount Algidus over the united forces of the Aequians and Volscians. This victory, which is related to have been fought on the 18th of June, decided the contest with the Aequians, who from this time forward appear as the subjects of Rome. According to universal tradition the dictator put his son to death in this campaign, because he quitted the post in which his father had placed him, through his desire of fighting with the enemy. This story is rejected by Livy. but on insufficient grounds, as Niebuhr has shown. Tubertus celebrated a triumph on his return to Rome. (Liv. 4.23, 26_29; Diod. 12.64; Ov. Fast. 6.721, foll.; Plut. Camill. 2; V. Max. 2.7.6; Gel. 17.21; Niebuhr, Hist. of Rome, vol. ii. p. 452, foll.)