In autumn 1355 the Constable was in the south where he, together with
John I, Count of Armagnac, who commanded an army of local troops, and the Marshal
Jean de Clermont were to defend against the expected invasion of the
Edward, Prince of Wales. When the Prince of Wales struck in October it was further south than expected, in the
County of Armagnac, rather than the
Garonne valley. The three French commanders hurried south to Toulouse, where they prepared themselves for a siege. On 28 October the Prince crossed the Garonne and the
Ariège, at places never before forded by horses, and marched north to within a few miles of Toulouse. Thinking the English might attempt to invest the city from both sides, the Constable left for
Montauban to hold the crossings of the
Tarn and the Garonne. Instead, the Prince continued eastward into lands previously untouched by the war and largely undefended. On 8 November he took
Narbonne, but was now far away from home territory. The Constable and Armagnac followed him east and taking up camp at the town of
Homps on the river
Aude seem first to have intended to cut off retreat and force him to battle on their own terms. In the end, no battle took place, as the French commanders decided to withdraw west towards Toulouse. During the English return westward serious disagreements over strategy broke out in Toulouse. During the whole campaign Armagnac had insisted on avoiding battle at all cost, concentrating on defending the principal cities and river crossings, thus abandoning the countryside to the English. This was deeply frustrating to the people of Languedoc and also resented by James who longed for action. The last opportunity to stop the English was made at the river
Save, but after watching the enemy for several days Armagnac on 21 November broke the bridges across the river and withdrew north. The Prince of Wales crossed the river the next day and on 28 November was back in English held territory. The French conduct of the defence was deeply unpopular in the south and although the Constable had not agreed to Armagnac's strategy and gave the King his own eye-witness account he could not escape the blame directed against the three commanders. On 12 November 1355, the day following
Edward III of England's return to Calais, after a largely fruitless raid into
Picardy, James and the Marshal
Arnoul d'Audrehem were behind an abortive proposal to settle the war in single combat between the two kings. ==Battle of Poitiers==