BELGICA Gallia, one of Cæsar's three divisions of Gaul, contained between the ocean to the north, the rivers Seine and Marne to the west, the Rhine to the east, but on the south at different times within different limits. Augustus, instituting every where a new partition of provinces, added the Sequani and Helvetii, who till then made a part of Celtic Gaul, to the Belgic (Pliny, Ptolemy). The gentilicious name is Belga, called by Cæsar the bravest of the Gauls, because untainted by the importation of luxuries. The epithet is Belgicus (Virgil).