Napoleon had determined to secure Spain and Portugal at all costs; and, placing himself at the head of the reinforcements, early in November defeated a Spanish force which attempted to bar his way, and advanced rapidly to Burgos. Thence he pushed a corps to the Carrion river, to protect his right flank from the British, while he moved on Madrid. In the meantime, Moore's main body was marching, viâ Ciudad Rodrigo, on Salamanca; while Hope, with the cavalry, artillery, and ammunition, had been sent by the circuitous route, Badajoz, Talavera, Madrid, Escorial Pass, to rejoin Moore at Salamanca, Valladolid, Burgos, or elsewhere, according to orders to be issued to him later. On the 15th November Moore reached Salamanca, and learned that the French had already occupied Valladolid. Consequently he decided to wait at Salamanca until Baird and Hope could join him. But the two latter had met with great difficulties in the matter of transport, and had been delayed beyond all expectations, so that on the 26th November the head of Baird's column had got no farther than Astorga, five marches north-west of Salamanca, and Hope was at the Escorial Pass, six marches south-east of Salamanca. On that same day Lefebre's French Corps, of 30,000 men, was approaching Valladolid, barely three marches north-east of Salamanca, while Napoleon himself, marching on Madrid, was at Arauda, some sixty miles as the crow flies due east of Valladolid. Fortunately for the divided British forces, Napoleon was in ignorance of their whereabouts; neither, on the other hand, was Moore aware of the exact situation of the French, until two days later, when both he and Hope were informed of Napoleon's proximity.