Battle of The Sabis - Prelude

Prelude

During the winter of 58-57 BC rumours came to Caesar’s ears that the Belgic tribes were forming a union because they feared possible Roman interference in their affairs. The union included the Bellovaci, Suessiones, Nervii, Atrebates, Ambiani, Morini, Menapii, Caleti, Veliocasses, Viromandui, Aduatuci, Condrusi, Eburones, Caeroesi, and Paemani tribes, and was under the leadership of Galba, a king of the Suessiones. These reports provided Caesar with a good pretext for conquering more than Gaul "itself", and for this, he raised two legions in Cisalpine Gaul (XIII and XIV) and convinced the Remi tribe to side with him.

In response, the other Belgic and Celtic tribes had attacked Bibrax (the oppidum of the Remi, situated near the Aisne River). Caesar countered by defending the oppidum and winning an action at the Aisne. In the face of this and because of shortage of provisions, the union collapsed and tribal armies retreated to their own lands, with the agreed future intention of coming to the support of any tribe invaded by the Romans. Caesar continued his advance and tribes surrendered one by one. However, four tribes, the Nervii,the Atrebates, the Aduatuci and the Viromandui refused to submit.

The Ambiani told Caesar that the Nervii were the most hostile of the Belgae to Roman rule. A fierce and brave tribe, they did not allow the import of luxury items as they believed these had a corrupting effect and probably feared Roman influence. They had no intention of entering peace negotiations with the Romans. Caesar would move on them next.