Early Roman accounts of war and raiding do not mention the Frisii as participants, though the neighboring Canninefates (to the west and southwest, in the delta) and Chauci (to the east) are named in that regard. The earliest mention of the Frisii tells of Drusus' 12 BC war against the Rhine Germans and the Chauci. The Romans did not attack them after devastating the lands of the Rhine Germans, but merely passed through their territory and along their coast in order to attack the Chauci. The account says that the Frisii were "won over", suggesting a Roman suzerainty was imposed.