Books like Asterix in Belgium

\ \ In this one, Chief Vitalstatistix takes off for Belgium after hearing from a Roman patrol that they like being in Gaul because the Belgians are worse, and they don't mind getting thumped here...enraged, off the chief goes, with Asterix and Obelix not far behind.The rest of the book involves the 3 Gauls bonding with the Belgians, and competing against to see who is better at thumping Romans.It goes so far as to ask Caesar to officiate the competition, which angers him immensely, so he leads his armies to crush them once and for all.Of course, the combined might of the Belgians and our 3 Gauls is enough to stop them entirely.Caesar is embarrassed, both tribes agree they're equally good at thumping Romans, and a banquet takes place.Shocker ;)\ \