 However, a raid on the rear guard of the Romans led to Marcellus besieging the town, which sent a herald to ask for peace again.Marcellus said that he would not grant peace unless the Arevaci, Belli, and Titti asked for it together.The Nertobriges sent ambassadors to these tribes and asked Marcellus for leniency and for the renewal of the treaty made with Tiberius Gracchus.