(1) T. etiam Quīntius Cincinnātus Praenestīnōs, quī ūsque ad urbis Rōmae portās cum bellō vēnerant, persecūtus ad flūmen Alliam vīcit, octō cīvitātēs, quae sub ipsīs agēbant, Rōmānīs adiūnxit, ipsam Praeneste adgressus in dēditiōnem accēpit.
(2) Quae omnia ab eō gesta sunt vīgintī diēbus triumphusque ipsī dēcrētus.
notes
T. Quīntius Cincinnātus: supposedly Praeneste, a Latin city 23 miles southeast of Rome, sent an army to the Colline Gate causing the Romans to nominate T. Quinctius Cincinnatus as dictator. The Praenestini withdrew to the Allia where they were defeated. Eight of their dependent towns were captured (Bird).
ūsque ad: "all the way up to", governing the accusative portās
persecūtus: perfect deponent participle in the nominative singular agreeing with Cincinnātus (see LS persequor)
sub ipsīs: "under the direction of these," (LS i.e., the citizens of Praeneste (Hazzard)
agēbant: "were living" (LS ago II.D.5)
adgressus: from aggredior, agreeing with Cincinnātus
(2) Quae omnia: = haec omnia; quae is a connecting relative, agreeing with omnia (AG 308.f)
ab eō: refers to Cincinnātus.
vīgintī diēbus: ablative of time within which (AG 423)
triumphusque ipsī dēcrētus: supply est. For more information on triumphs, see triumphs.