Intervening again in an intra-Gallic conflict, Caesar marched against the Belgae, who inhabited the area roughly bounded by modern-day Belgium. They had recently attacked a tribe allied with Rome and before marching with his army to meet them, Caesar ordered the Remi and other neighboring Gauls to investigate the Belgae's actions. The Belgae and the Romans encountered each other near Bibrax. The Belgae attempted to take the fortified "oppidum" (main settlement) from the Remi but were unsuccessful and chose instead to raid the nearby countryside. Each side tried to avoid battle, as both were short on supplies (a continuing theme for Caesar, who was often faster than his own baggage train). Caesar ordered fortifications built, which the Belgae understood would give them a disadvantage. Instead of making battle, the Belgic army simply disbanded, as it could be re-assembled easily.