Hasdrubal Barca in central Spain, the other Hasdrubal near the mouth of the Tagus, and Mago near Gibraltar; each was ten days’ march from New Carthage. Thus one morning early in 209 the small garrison of the city awoke to find the town beleaguered by land and sea. For Scipio, leaving Silanus to guard his communications, had marched south with his main army at great speed and arrived at the same time as the fleet under his friend Laelius.
The town lay on a peninsula, which ran east and west, within a deep bay which faced south. On the east the peninsula was joined to the mainland by a narrow isthmus. On the west it was separated from the mainland by a narrow channel which ran north into a large lagoon which spread over the land immediately north of the town. The town was thus surrounded by water on three sides: by the lagoon in the north, by the canal in the west, and by the bay and open sea on the south. On his arrival Scipio encamped on a hill across the eastern isthmus. Next day after beating back a sortie he vigorously assaulted the town from the land side, while the fleet attacked from the south. The first assault failed, but later in the day he renewed the attack and simultaneously sent a party through the lagoon to storm the northern walls while the enemy’s attention was engaged on the other fronts. This lagoon was shallow and in part fordable, but was probably not affected by any tidal action of the sea. When the wading party was about to start, a squall from the north suddenly sprang up and lowered the level of the lagoon by driving the water into the bay. Of this possibility Scipio who had made careful topographical enquiries during the winter may have been aware. To the men, however, it seemed like the direct intervention of heaven, not out of keeping with the mystical self-confidence of their inspired leader. The men raced through the now shallow waters and scaled the deserted battlements, for all attention was focused on Scipio’s frontal attack. Sweeping along the northern wall the escalading party fell on the enemy in the rear. At the same moment the wholedefence was crumbling and the naval detachment was scaling the southern walls. So fell the city. 1
Thus Scipio had won the key position in Spain. Besides an immense quantity of booty, money and munitions, he gained control of the local silver mines and thus cut deep into the enemy’s revenue. By his wise treatment of the Spanish hostages and prisoners, he obtained more than mere territorial advance. His romantic personality and his generous outlook, like that of Sertorius later, fired the Spaniards’ imagination, so that many native princes came over to him. He spent the rest of the year building up a new model army, drilling it in tactical reforms of far-reaching effect and training it in the use of new weapons. He adopted the Spanish sword and perhaps adapted the javelin ( pilum ) which led the Romans to the mastery of the civilized world. Meanwhile the three Carthaginian armies abandoned without a blow the eastern shore of Spain and held on to the south and interior.
Scipio now had a base sufficiently far south to justify an offensive in Baetica, where he marched early in 208. Hasdrubal Barca, who was quartered near Castulo, advanced to a strong position south-east of Baecula (Bailen) which he hoped would counterbalance the numerical superiority of the Romans. Scipio occupied the hills opposite, but fearing the arrival of a second Carthaginian army he decided to fight on the ground chosen by Hasdrubal. This was a gradual hill, broken half-way up by a flattish terrace; the front and rear were protected by rivers, the sides by streams or watercourses. The Roman light-armed troops at first engaged the enemy’s covering force on the terrace, while Hasdrubal began to lead his main forces out of the camp down towards it. Scipio sent all his light troops to support the first attack and to engage the enemy’s attention. Meanwhile he divided his main army.