Weary of a course of operations without results, and impatient to put an end to the war, the senate resolved to change its system, and to assail Carthage in Africa. In the spring of 498 a fleet of 330 ships of the line set sail for the coast of Libya: at the mouth of the river Himera on the south coast of Sicily it embarked the army for landing, consisting of four legions, under the charge of the two consuls Marcus Atilius Regulus and Lucius Manlius Volso, both experienced generals. The Carthaginian admiral suffered the embarkation of the enemy's troops to take place; but on continuing their voyage towards Africa the Romans found the Punic fleet drawn up in order of battle off Ecnomus to protect its native land from invasion. Seldom have greater numbers fought at sea than were engaged in the battle that now ensued. The Roman fleet: of 330 sail contained at least 100,000 men in its crews, besides the landing army of about 40,000; the Carthaginian of 350 vessels was manned by at least an equal number; so that well-nigh three hundred thousand men were brought into action on this day to decide the contest between the two mighty civic communities. The Phoenicians were placed in a single widely-extended line, with their left wing resting on the Sicilian coast. The Romans arranged themselves in a triangle, with the ships of the two consuls as admirals at the apex, the first and second squadrons drawn out in oblique line to the right and left, and a third squadron, having the vessels built for the transport of the cavalry in tow, forming the line which closed the triangle. They thus bore down in close order on the enemy. A fourth squadron placed in reserve followed more slowly. The wedge-shaped attack broke without difficulty the Carthaginian line, for its centre, which was first assailed, intentionally gave way, and the battle resolved itself into three separate engagements. While the admirals with the two squadrons drawn up on the wings pursued the Carthaginian centre and were closely engaged with it, the left wing of the Carthaginians drawn up along the coast wheeled round upon the third Roman squadron, which was prevented by the vessels which it had in tow from following the two others, and by a vehement onset in superior force drove it against the shore; at the same time the Roman reserve was turned on the open sea, and assailed from behind, by the right wing of the Carthaginians. The first of these three engagements was soon at an end; the ships of the Carthaginian centre, manifestly much weaker than the two Roman squadrons with which they were engaged, took to flight. Meanwhile the two other divisions of the Romans had a hard struggle with the superior enemy; but in close fighting the dreaded boarding-bridges stood them in good stead, and by this means they succeeded in holding out till the two admirals with their vessels could come up. By their arrival the Roman reserve was relieved, and the Carthaginian vessels of the right wing retired before the superior force. And now, when this conflict had been decided in favour of the Romans, all the Roman vessels that still could keep the sea fell on the rear of the Carthaginian left wing, which was obstinately following up its advantage, so that it was surrounded and almost all the vessels composing it were taken. The losses otherwise were nearly equal. Of the Roman fleet 24 sail were sunk; of the Carthaginian 30 were sunk, and 64 were taken.

Notwithstanding its considerable loss, the Carthaginian fleet did not give up the protection of Africa, and with that view returned to the gulf of Carthage, where it expected the descent to take place and purposed to give battle a second time. But the Romans landed, not on the western side of the peninsula which helps to form the gulf, but on the eastern side, where the bay of Clupea presented a spacious harbour affording protection in almost all winds, and the town, situated close by the sea on a shield-shaped eminence rising out of the plain, supplied an excellent defence for the harbour. They disembarked the troops without hindrance from the enemy, and established themselves on the hill; in a short time an entrenched naval camp was constructed, and the land army was at liberty to commence operations. The Roman troops ranged over the country and levied contributions: they were able to send as many as 20,000 slaves to Rome. Through the rarest good fortune the bold scheme had succeeded at the first stroke, and with but slight sacrifices: the end seemed attained. The feeling of confidence that in this respect animated the Romans is evinced by the resolution of the senate to recall to Italy the greater portion of the fleet and half of the army; Marcus Regulus alone remained in Africa with 40 ships, 15,000 infantry, and 500 cavalry. Their confidence, however, was seemingly not overstrained. The Carthaginian army, which was disheartened, did not venture forth into the plain, but waited to sustain discomfiture in the wooded defiles, in which it could make no use of its two best arms, the cavalry and the elephants. The towns surrendered en masse; the Numidians rose in insurrection, and overran the country far and wide. Regulus might hope to begin the next campaign with the siege of the capital, and with that view he pitched his camp for the winter in its immediate vicinity at Tunes.

The spirit of the Carthaginians was broken: they sued for peace. But the conditions which the consul proposed - not merely the cession of Sicily and Sardinia, but the conclusion of an alliance on unequal terms with Rome, which would have bound the Carthaginians to renounce a war-marine of their own and to furnish vessels for the Roman wars - conditions which would have placed Carthage on a level with Neapolis and Tarentum, could not be accepted, so long as a Carthaginian army kept the field and a Carthaginian fleet kept the sea, and the capital stood unshaken.

The mighty enthusiasm, which is wont to blaze up nobly among Oriental nations, even the most abased, on the approach of extreme peril - the energy of dire necessity - impelled the Carthaginians to exertions, such as were by no means expected from a nation of shopkeepers. Hamilcar, who had carried on the guerilla war against the Romans in Sicily with so much success, appeared in Libya with the flower of the Sicilian troops, which furnished an admirable nucleus for the newly-levied force. The connections and gold of the Carthaginians, moreover, brought to them excellent Numidian horsemen in troops, and also numerous Greek mercenaries; amongst whom was the celebrated captain Xanthippus of Sparta, whose talent for organization and strategical skill were of great service to his new masters[6]. While the Carthaginians were thus making their preparations in the course of the winter, the Roman general remained inactive at Tunes. Whether it was that he did not anticipate the storm which was gathering over his head, or that a sense of military honour prohibited him from doing what his position demanded - instead of renouncing a siege which he was not in a condition even to attempt, and shutting himself up in the stronghold of Clupea, he remained with a handful of men before the walls of the hostile capital, neglecting even to secure his line of retreat to the naval camp, and neglecting to provide himself with - what above all he wanted, and what might have been so easily obtained through negotiation with the revolted Numidian tribes - a good light cavalry. He thus wantonly brought himself and his army into a plight similar to that which formerly befell Agathocles in his desperate adventurous expedition.