The Estremaduran expedition of January-March 1811, therefore, must be looked upon as the private scheme of the Duke of Dalmatia[45], undertaken with the general object of giving _indirect_ assistance to Masséna, because the last orders that he had received from Paris (those of October 26), telling him to give _direct_ assistance, by sending Mortier to the Tagus, were impossible of execution[46]. Soult had two leading ideas in his mind when he planned out his campaign. The first was that he was going into a country thickly set with fortresses; the second was that, when once the skirts of the Sierra Morena have been passed, Estremadura is a ‘cavalry country,’ a land of heaths and of unenclosed tillage-fields of vast area. Accordingly he intended to march with a very large force of cavalry, and with a heavy siege-train. At Seville he had at his disposition the greatest arsenal of Spain; but for many months all that it produced had been going forward to Cadiz: no less than 290 pieces had been sent to arm the vast lines in front of the blockaded city. Accordingly it took some time to get ready the heavy guns, and to manufacture the ammunition required for such a big business as the siege of the six fortresses, small and great, into whose midst he was about to thrust himself. The personnel for the siege-train had also to be collected: requisitions were sent, both to Victor at Cadiz and to Sebastiani at Granada, to detach and send into Seville nearly all their sappers, and the men of several companies of artillery. They were also to send to the expeditionary force many regiments of cavalry. Mortier had only two (10th Hussars and 21st Chasseurs), which had sufficed when he was engaged in the heights of the Sierra Morena, but were insufficient when he was about to descend into the plain of the Guadiana. Accordingly half the cavalry of Victor’s 1st Corps was called up--four regiments (4th, 14th, 26th Dragoons, 2nd Hussars), while Sebastiani gave up one (27th Chasseurs); to these was added an experimental Spanish cavalry regiment of ‘Juramentados’ recently organized at Seville. Only one infantry regiment was requisitioned, the 63rd Line, from Victor’s 3rd Division. The putting together of these resources gave a force in which the proportions of the arms were very peculiar--4,000 cavalry, 2,000 artillery and sappers, to only 13,500 infantry; the last, all save the above-mentioned 63rd regiment, drawn from Mortier’s 5th Corps. The orders for the concentration of the troops were issued early in December, but owing to the time required for drawing in units from Granada and Cadiz, and for the preparation of the siege-train, it was not till the last day of the old year that the Marshal took his departure from Seville. [45] He calls it ‘la détermination que j’avais prise sur de simples avis indirects.’ To Berthier, January 25.