Verse 30.  For the ships of Chittim shall come against him.  Chittim is well known to mean the Roman empire.  Antiochus, being now in full march to besiege Alexandria, and within seven miles that city, heard that ships were arrived there from Rome, with legates from the senate.  He went to salute them.  They delivered to him the letters of the senate, in which he was commanded, on pain of the displeasure of the Roman people, to put an end to the war against his nephews.  Antiochus said he would go and consult his friends; on which Popilius, one of the legates, took his staff, and instantly drew a circle round Antiochus on the sand where he stood and, commanded him not to pass that circle till he had given a definitive answer.  Antiochus, intimidated, said, he would do whatever the senate enjoined; and in a few days after began his march, and returned to Syria.  This confirmed by Polybius, Livy, Velleius, Paterculus, Valerius Maximus, and Justin.  Adam Clarke's Commentary, Dan. 11:30