The problem in poliorcetics set before Suchet and his engineers at Tortosa had some resemblance to that which was to confront Wellington at Badajoz a few months later. Given a town to besiege which is partly built on heights crowned by forts and partly in the flat, is it better to attack one of the forts, which if taken commands the whole town, or to start against the lower front? The latter will be easier to assail, but after its fall the strongholds on the heights may hold out as independent fortresses. Whereas if a dominating work on a high-lying hill is taken in hand, it may make a very hard and long resistance, but, if once it is captured, the whole city is overlooked by it and must surrender. The answer to the problem seems to be that all depends on the governor and the garrison; if he and they are weak, it will suffice to attack the easier front, for when the lower town has fallen the morale will be so shaken that they will surrender, without attempting to hold the upper works. But if they are active and obstinate, it may be worth while to aim at the most commanding position, which, if captured, absolutely compels the capitulation of the whole place. Yet there remains the danger that the crucial fort may be so strong that no effort can take it from a determined defender. This happened to Wellington at the two earlier sieges of Badajoz; the fall of San Cristobal would have brought about most inevitably the surrender of the city. But it proved too hard a nut to crack, in the time and with the means at the English general’s disposal. Suchet at Tortosa struck at the easiest front, taking the risk that he might have to conduct a second siege of the upper works (as he had to do at Tarragona, his next leaguer). When he had breached the weakest point, but before a storm had been tried, the imbecile governor capitulated. The weak front of Tortosa was the bastion of San Pedro and the demi-lune of El Temple on its flank. They were not properly supported or flanked by any works on higher ground, for Fort Orleans (on the nearest hill) did not command all the flats in front of San Pedro, and moreover Suchet intended to give this fort so much business on its own account that its gunners would have little attention to spare for the attack on the lower ground to their right. There were two additional advantages: the soil in front of San Pedro was soft river mould, very easy to dig; and moreover this bastion could be enfiladed by batteries on the other side of the Ebro. Such batteries had nothing to fear, if properly constructed, from the guns of the little _tête-du-pont_; while on the river front of the city there were no cannon at all--they could not be mounted on the mediaeval walls.