As the centre of the road junction, Bavay was an obligatory passage between Germania and the naval port of Boulogne-sur-Mer, a bridgehead to Britain. Other routes, seven in total, connected the capital city of the Nervii to the capital cities of neighbouring peoples (Amiens via Arras, Tongeren, Cassel, Trier in the east and Reims in the south). Its position was evidently strategic, but soon these military routes (the future emperor Tiberius transited at Bavay with his armies around 4 AD) were used for commercial purposes.