immediately. Rome had only just recently defeated the Macedonians at the Battle of Pydna, potentially freeing up armies with which it could credibly threaten the Seleucids with. Antiochus begged to have time to consider but Popilius drew a circle round him in the sand with his cane and told him to decide before he stepped outside it. Antiochus chose to obey the Roman ultimatum to avoid a new Roman–Seleucid War, a retreat that Polybius described as personally humiliating for Antiochus. The "Day of Eleusis" ended the Sixth Syrian War and Antiochus' hopes of conquering Egyptian territory. Still, the Ptolemies were greatly weakened by the war as well as the conflict between Ptolemy VI and VIII. A rebel named Dionysus Petrosarapis would attempt to exploit the animosity between the two Ptolemy brothers and start a series of revolts from 168–164 BC. Ptolemy VI's intervention in the Seleucid Dynastic Wars While not usually classed as the "Seventh Syrian War", the Ptolemies and a portion of the Seleucids would clash again in 145 BC. The Seleucid Empire began to fall to internal disorder in 152 BC as the Romans and Pergamese, seeking to destabilize and weaken Syria, encouraged Alexander Balas to make a hostile claim on the throne against King Demetrius I Soter. Alexander's allies funded him and hired mercenaries on his behalf, and he was able to gain the loyalty of those of Syria who disliked Demetrius, such as Jewish military leader Jonathan Apphus. Alexander eventually won the civil war, a diplomatic coup for Ptolemy VI who saw a competent, ambitious, and hostile Seleucid rival in Demetrius replaced by an opportunist in Balas. Ptolemy VI's daughter Cleopatra Thea married Alexander Balas as a gesture of friendship. However, this peace was not to last. Demetrius II, Demetrius I's son, made a play to overthrow Balas, who gained a reputation as a weak ruler (whether deserved or not). The civil war resumed, and Egyptian forces massed on the border around 147 BC, ready to intervene in the Seleucid civil war. With Alexander's permission, they occupied much of coastal Coele-Syria, with the cooperation of Alexander's Jewish allies who expanded and took over more of the Judean hills and interior. As Ptolemy VI marched north, he switched sides and demanded his son-in-law hand over his chief minister on likely faked charges. Presumably Demetrius II had offered to legitimize Ptolemaic rule of Coele-Syria if he switched to