Vittoria.
General Clausel fell back as Wellington advanced to Burgos, and the British laid siege to the castle of that place. Like all Wellington's sieges this was commenced with a wholly insufficient train of artillery, and without the time necessary to carry out regular siege operations. A considerable portion of the army were posted so as to watch Clausel. The place was badly fortified, but the French under Governor Dubreton defended themselves with immense skill and courage, the English assaults were repulsed, successful sorties were made by the garrison, and at last, after the failure of the fourth assault, the siege was given up, and the allied armies turned their faces once more towards Portugal.

It was time; the operations in the south upon which Wellington had relied to keep at least a portion of the French forces engaged, had failed signally, and the French generals were bringing up their troops from all parts of Spain, and General Souham, having under him Generals Clausel, Maucune, and Foy, with a force far superior to that of the British, advanced to give battle. Then Wellington, whose Anglo-Portuguese troops were much weakened by sickness, fell back rapidly, sending orders to General Hill, who commanded the troops left behind in Madrid, to evacuate that city, and to fall back and unite with him on the Tormes.