Q. Lutātius A. Mānlius cōnsulēs creātī sunt. Bellum Faliscīs intulērunt, quae cīvitās Ītaliae opulenta quondam fuit. Quod ambō cōnsulēs intrā sex diēs, quam vēnerant, trānsēgērunt, XV mīlibus hostium caesīs, cēterīs pace concessā, agrō tamen ex medietāte sublātō.
notes
The defeat of the Falisci (241 BCE)
Q. Lutātius A. Mānlius cōnsulēs: Quintus Lutatius Cerco and Aulus Manlius Torquatus Atticus were consuls in 241 BCE.
Faliscīs: Faliscīs is the dative object of intulērunt (LS infero I.β). Falisci was the name of the inhabitants of Falerii Veteres. See Brev. 1.20.
Quod: "this war," connecting relative (AG 308.f), accusative. object of trānsēgērunt.
quam vēnerant: refers to diēs. The Falisci, who lived north of Veii, rebelled and were defeated in six days in 241 and their hilltop capital, Falerii, was destroyed. Its inhabitants were transferred to Falerii Novi, on the plain three miles to the west. Half their territory it was annexed as ager publicus (Livy, Epitome of Book 20) (Bird).
XV mīlibus hostium caesīs: ablative absolute using perfect passive participle (AG 419)
cēterīs: dative
agrō tamen ex medietāte sublātō: "but half of their land was taken from them" (Bird), ablative absolute using perfect passive participle (AG 419). sublātō > tollō. medietās is an equivalent of medium common in later Latin authors.