HKB
[Sidenote: The Roman cavalry retreat.]
+73.+ When the two forces came within distance, the light-armed troops in front of the two armies closed with each other. In this part of the battle the Romans were in many respects at a disadvantage, while the Carthaginians had everything in their favour. For the Roman spearmen had been on hard service ever since daybreak, and had expended most of their weapons in the engagement with the Numidians, while those weapons which were left had become useless from being long wet. Nor were the cavalry, or indeed the whole army, any better off in these respects. The case of the Carthaginians was exactly the reverse: they had come on the field perfectly sound and fresh, and were ready and eager for every service required of them. As soon, therefore, as their advanced guard had retired again within their lines, and the heavy-armed soldiers were engaged, the cavalry on the two wings of the Carthaginian army at once charged the enemy with all the effect of superiority in numbers, and in the condition both of men and horses secured by their freshness when they started. The Roman cavalry on the contrary retreated: and the flanks of the line being thus left unprotected, the Carthaginian spearmen and the main body of the Numidians, passing their own advanced guard, charged the Roman flanks: and, by the damage which they did them, prevented them from keeping up the fight with the troops on their front. The heavy-armed soldiers, however, who were in the front rank of both armies, and in the centre of that, maintained an obstinate and equal fight for a considerable time.
[Sidenote: Both Roman wings defeated.]
[Sidenote: The Roman centre fights its way to Placentia.]
+74.+ Just then the Numidians, who had been lying in ambush, left their hiding-place, and by a sudden charge on the centre of the Roman rear produced great confusion and alarm throughout the army. Finally both the Roman wings, being hard pressed in front by the elephants, and on both flanks by the light-armed troops of the enemy, gave way, and in their flight were forced upon the river behind them. After this, while the centre of the Roman rear was losing heavily, and suffering severely from the attack of the Numidian ambuscade, their front, thus driven to bay, defeated the Celts and a division of Africans, and, after killing a large number of them, succeeded in cutting their way through the Carthaginian line. Then seeing that their wings had been forced off their ground, they gave up all hope of relieving them or getting back to their camp, partly because of the number of the enemy’s cavalry, and partly because they were hindered by the river and the pelting storm of rain which was pouring down upon their heads. They therefore closed their ranks, and made their way safely to Placentia, to the number of ten thousand. Of the rest of the army the greater number were killed by the elephants and cavalry on the bank of the Trebia; while those of the infantry who escaped, and the greater part of the cavalry, managed to rejoin the ten thousand mentioned above, and arrived with them at Placentia. Meanwhile the Carthaginian army pursued the enemy as far as the Trebia; but being prevented by the storm from going farther, returned to their camp. They regarded the result of the battle with great exultation, as a complete success; for the loss of the Iberians and Africans had been light, the heaviest having fallen on the Celts. But from the rain and the snow which followed it, they suffered so severely, that all the elephants except one died, and a large number of men and horses perished from the cold.
[Sidenote: Winter of B.C. 118-117. Great exertions at Rome to meet the danger.]