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
Aetolian Intrigues against Rome
While the storm was thus gathering from far and wide against Rome, it was on this, as on all occasions, the Greeks implicated in the enterprise, who were of the least moment, and yet took action of the greatest importance and with the utmost impatience. The exasperated and arrogant Aetolians began by degrees to persuade themselves that Philip had been vanquished by them and not by the Romans, and could not even wait till Antiochus should advance into Greece.
Their policy is characteristically expressed in the reply, which their -strategus- gave soon afterwards to Flamininus, when he requested a copy of the declaration of war against Rome: that he would deliver it to him in person, when the Aetolian army should encamp on the Tiber. The Aetolians acted as the agents of the Syrian king in Greece and deceived both parties, by representing to the king that all the Greeks were waiting with open arms to receive him as their true deliverer, and by telling those in Greece who were disposed to listen to them that the landing of the king was nearer than it was in reality.
Thus they actually succeeded in inducing the simple obstinacy of Nabis to break loose and to rekindle in Greece the flame of war two years after Flamininus's departure, in the spring of 562; but in doing so they missed their aim. Nabis attacked Gythium, one of the towns of the free Laconians that by the last treaty had been annexed to the Achaean league, and took it; but the experienced -strategus- of the Achaeans, Philopoemen, defeated him at the Barbosthenian mountains, and the tyrant brought back barely a fourth part of his army to his capital, in which Philopoemen shut him up.
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Reference address : https://www.ellopos.net/elpenor/rome/3-09-war-antiochus-asia.asp?pg=12