In 387 the lost territory adjacent to the Tiber was annexed, and military colonies were planted at Sutrium and Nepete upon the Etruscan border, and also at Circeii and Setia.

(Footnote: These military colonies, of which the Romans subsequently planted many, were outposts established to protect conquered territory.

A band of Roman citizens was armed and equipped, as if for military purposes.

They took with them their wives and children, slaves and followers, and established a local government similar to that of Rome.

These colonists relinquished their rights as Roman citizens and became Latins; hence the name LATIN COLONIES.) The neighboring Latin town of TUSCULUM, which had always been a faithful ally, was annexed to Rome.
The trying times of these years had caused numerous enemies to spring up all around Rome; but she showed herself superior to them all, until finally, in 353, she had subdued the whole of Southern Etruria, and gained possession of the town of CAERE, with most of its territory.