Meanwhile Soult resolved to make a blow at Mendizabal and his field army, which was visible day after day encamped on the San Cristobal heights, in a position imposing but unfortified and ill-watched. The Marshal had intended to cross the Guadiana and deliver his attack even before the Pardaleras was taken, but much rain was falling, and the river had overflowed its banks, so that access to the point where the French flying-bridge had been established, a mile above Badajoz, was difficult. Moreover the Gebora was also in flood, and reported to be unfordable, though usually a slender stream. The only thing which the Marshal was able to do between the 11th and the 18th of February was to shell the nearer end of the heights of San Cristobal from the batteries in his right attack, with the object of inducing the Spanish battalions there encamped to move further from the protection of the fort, which effectually covered their right flank. On February 13th this plan was seen to have been effective: the Spaniards had withdrawn from the neighbourhood, and had left half a mile unoccupied between San Cristobal and their new camp. On the afternoon of the 18th it was reported to Soult that both the rivers had fallen, and that the Gebora had again become fordable. He made no delay, and at dusk his striking-force began to cross the Guadiana--the operation was slow, since only two flying-bridges and a few river-boats were available. But at dawn nine battalions[72], three squadrons, and two batteries were on the north bank, while Latour-Maubourg had come up from his usual post at Montijo with six cavalry regiments more. The whole force assembled in the angle between the Guadiana and the Gebora amounted to no more than 4,500 infantry[73] and 2,500 horse, with twelve guns, a total so much below Mendizabal’s 9,000 infantry and 3,000 cavalry that the adventure seemed most hazardous. But fortune often favours the audacious, and on this day Soult chanced on the unexpected luck of a very foggy morning. He was practically able to surprise the enemy, for the first warning that a battle was at hand only came to Mendizabal when, shortly after dawn, his picket at the broken bridge of the Gebora--a short mile or so in front of the heights--was driven in by masses of French infantry. At the same moment a tumult broke out on his left rear: the 2nd Hussars, sent on by Latour-Maubourg to discover and turn the Spanish northern flank, had been able to mount the heights unseen and unopposed, by making a long détour, and rode unexpectedly into the camp of one of Carlos de España’s regiments. Mendizabal’s troops flew to arms, and began hastily to form their line upon the heights, but they had no time to get into good order, for the enemy was upon them within a few minutes. [72] Three battalions each of the 34th, 88th, and 100th Line.