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
Their Political Qualities
Above all, the Phoenicians, like the rest of the Aramaean nations as compared with the Indo-Germans, lacked the instinct of political life --the noble idea of self-governing freedom. During the most flourishing times of Sidon and Tyre the land of the Phoenicians was a perpetual apple of contention between the powers that ruled on the Euphrates and on the Nile, and was subject sometimes to the Assyrians, sometimes to the Egyptians.
With half its power Greek cities would have made themselves independent; but the prudent men of Sidon calculated that the closing of the caravan-routes to the east or of the ports of Egypt would cost them more than the heaviest tribute, and so they punctually paid their taxes, as it might happen, to Nineveh or to Memphis, and even, if they could not avoid it, helped with their ships to fight the battles of the kings.
And, as at home the Phoenicians patiently bore the oppression of their masters, so also abroad they were by no means inclined to exchange the peaceful career of commerce for a policy of conquest. Their settlements were factories. It was of more moment in their view to deal in buying and selling with the natives than to acquire extensive territories in distant lands, and to carry out there the slow and difficult work of colonization.
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=5