Breuci are Illyrians of the subtribe of Pannonians.

They greatly resist the Romans but are sold as slaves after their defeat.

They start receiving Roman citizenship during Trajan's rule.

It is likely that the name of the northeastern Bosnian city Brčko is derived from the name of this tribe.

A number of Breuci settle in Dacia.

Bato the Breucian of the Breuci tribe and Pinnes from Pannonia are among the leaders of the Great Illyrian Revolt, together with Baton the Daesitiate of the Daesitiates from Dalmatia.