After two years of rebuilding and rearming (which is my opinion, remember, completely unbuttressed by anything in the sources) Pepin was ready to push the Aquitanian war to its conclusion. “[H]e summoned to Orleans the whole host of the Franks and the other peoples that dwelt in his kingdom.”1.Fredegar, ch.48, p.116. Then he again surged across the Loire and into Aquitaine.
The Royal Frankish Annals say that Pepin went as far as the fortress of Argenton, roughly midway between Poitiers and Bourges. Fredegar says he went all the way to Agen, which is much farther south, on the road between Bordeaux and Toulouse. Perhaps both are true, and the king stopped at Argenton to rebuild the castle there that Waifar had ordered destroyed in 763. Having put that work in motion he led the rest of the army more than two hundred miles south to Agen (probably close to 300 miles if he took the roads, which skirt the Massif Central of France) as he “laid waste the whole region” during the trek.