Beyond these were found the Frisians, a people of German origin, who gave their name to the territory between the Rhine and the Ems. Of the other tribes the best known are the Caninefates, Chauci, Usipetes, Sicambri, Eburones, Menapii, Morini and Aduatici.
At Aduatuca (near Aixla-Chapelle) a newly-raised legion was cut to pieces by the Eburones under Ambiorix, while Quintus Cicero was besieged in the neighbourhood of Namur and only just relieved in time by Caesar, who was obliged to winter in Gaul in order to check the spread of the rebellion.
C. was marked by a second crossing of the Rhine and by the destruction of the Eburones, whose leader Ambiorix, however, escaped.
At the earliest historical period we find the territories between the Ardennes and the Rhine occupied by the Treviri, the Eburones and other Celtic tribes, who, however, were all more or less modified and influenced by their Teutonic neighbours.