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
Settlement of Spartan Affairs
At last the obstinate resistance came to an end. Sparta retained its independence and was neither compelled to receive back the emigrants nor to join the Achaean league; even the existing monarchical constitution, and Nabis himself, were left intact. On the other hand Nabis had to cede his foreign possessions, Argos, Messene, the Cretan cities, and the whole coast besides; to bind himself neither to conclude foreign alliances, nor to wage war, nor to keep any other vessels than two open boats; and lastly to disgorge all his plunder, to give to the Romans hostages, and to pay to them a war-contribution.
The towns on the Laconian coast were given to the Spartan emigrants, and this new community, who named themselves the "free Laconians" in contrast to the monarchically governed Spartans, were directed to enter the Achaean league. The emigrants did not receive back their property, as the district assigned to them was regarded as a compensation for it; it was stipulated, on the other hand, that their wives and children should not be detained in Sparta against their will. The Achaeans, although by this arrangement they gained the accession of the free Laconians as well as Argos, were yet far from content; they had expected that the dreaded and hated Nabis would be superseded, that the emigrants would be brought back, and that the Achaean symmachy would be extended to the whole Peloponnesus.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=66