When Seleukus, in a tone of deep feeling and with tears in his eyes, made this avowal, Erasistratus took him by the hand, in token of good faith, and declared that his own services were quite useless, for that Seleukus himself was best able to heal the disorders which had arisen in his household. After this Seleukus convoked a general assembly of his people, and declared to them that he had determined to nominate Antiochus king, and Stratonike queen of all the nations of the interior, and that they were to be married. He believed, he said, that his son, who had always been accustomed to obey him, would raise no objection to the marriage; and that if his wife was discontented with it on the ground of its illegality, he begged his friends to argue with her and persuade her to regard everything as legal and honourable which the king decided upon as expedient. In this manner it is said to have come to pass that Antiochus was married to Stratonike. XXXIX. After obtaining Macedonia, Demetrius made himself master of Thessaly also. As he possessed the greater part of Peloponnesus, besides Megara and Athens, he now marched against Boeotia. At first the Boeotians came to terms, and formed an alliance with him, but afterwards, when Kleonymus of Sparta came to Thebes with an army, and Pisis, the most influential citizen of Thespiæ, encouraged them to recover their liberty, they revolted from Demetrius. Upon this, Demetrius brought up his famous siege train to attack their cities.[317] Kleonymus was so terrified that he secretly withdrew, and the Boeotians were scared into submission. Demetrius, though he garrisoned all their cities with his own troops, levied a large sum of money, and left Hieronymus[318] the historian as governor of the province, was thought to have dealt very mildly with the Boeotians, especially because of his treatment of Pisis; for he not only dismissed him unharmed when brought before him as a prisoner, but conversed with him in a friendly manner, and nominated him polemarch of Thespiæ. Not long after these events, Lysimachus was taken prisoner by Dromichætus. Upon this, Demetrius at once hurriedly marched towards Thrace, hoping to find it unguarded. The Boeotians seized the opportunity of his absence to revolt, while news was brought to Demetrius that Lysimachus had been dismissed by his captors. Enraged at this, he speedily returned, and finding that the Boeotians had been defeated in a pitched battle by his son Antigonus, he a second time laid siege to Thebes.