Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Preparations in Africa
The Carthaginians, who had long expected that the plundering expeditions, which the Roman squadrons had frequently made during the last few years to the African coast, would be followed by a more serious invasion, had not only, in order to ward it off, endeavoured to bring about a revival of the Italo-Macedonian war, but had also made armed preparation at home to receive the Romans. Of the two rival Berber kings, Massinissa of Cirta (Constantine), the ruler of the Massylians, and Syphax of Siga (at the mouth of the Tafna westward from Oran), the ruler of the Massaesylians, they had succeeded in attaching the latter, who was far the more powerful and hitherto had been friendly to the Romans, by treaty and marriage alliance closely to Carthage, while they cast off the other, the old rival of Syphax and ally of the Carthaginians.
Massinissa had after desperate resistance succumbed to the united power of the Carthaginians and of Syphax, and had been obliged to leave his territories a prey to the latter; he himself wandered with a few horsemen in the desert. Besides the contingent to be expected from Syphax, a Carthaginian army of 20,000 foot, 6000 cavalry, and 140 elephants--Hanno had been sent out to hunt elephants for the very purpose--was ready to fight for the protection of the capital, under the command of Hasdrubal son of Gisgo, a general who had gained experience in Spain; in the port there lay a strong fleet. A Macedonian corps under Sopater, and a consignment of Celtiberian mercenaries, were immediately expected.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=82