Book 19
The Aetolians now formally vote to call in Antiochus, to liberate Greece and arbitrate between them and Rome. They occupy Demetrias; and kill Nabis by a stratagem. Whereupon Philopoemen annexes Sparta to the Achaean league. Later in the year Antiochus meets the assembly of the Aetolians at Lamia in Thessaly, is proclaimed Strategus; and after a vain attempt to conciliate the Achaeans seizes Chalcis, where he winters, and marries a young wife.
B. C. 191: P. Cornelius Scipio Nasica, M. Acilius Glabrio, Coss. The Romans declare war with Antiochus. Manius Acilius is selected to go to Greece, where he takes over the army of Baebius, and after taking many towns in Thessaly meets and defeats Antiochus at Thermopylae; where the Aetolian league did after all little service to the king, who retires to Ephesus.
See Livy, 34, 43—36, 21. See also Plutarch, Philopoemen, and Flamininus; Appian, Syriacae, 6—21.