The Latin League (Latin: Foedus Latinum; c. 7th century BC – 338 BC) was a confederation of about 30 villages and tribes in the region of Latium near ancient Rome, organized for mutual defense. The term "Latin League" is one coined by modern historians with no precise Latin equivalent.
It was originally created for protection against enemies from surrounding areas (the Etruscans) under the leadership of the city of Alba Longa. An incomplete fragment of an inscription recorded by Cato the Elder tells us that at one time the league included Tusculum, Aricia, Lanuvium, Lavinium, Cora, Tibur, Pometia and Ardea.
During the reign of Tarquinius Superbus, the Latins were persuaded to acknowledge the leadership of Rome. The treaty with Rome was renewed, and it was agreed that the troops of the Latins would attend on an appointed day to form a united military force with the troops of Rome. This was done, and Tarquin formed combined units of Roman and Latin troops.