Alexander Balas. Seleucid Emperor. Reigned 150-145 B.C.E. He claimed to be a son of the Seleucid Emperor Antiochus IV, but was in fact a commoner set up by Egypt and Pergamum. He easily eliminated the reigning emperor Demetrius I. This was a period of civil war in the Seleucid Empire, and Demetrius II son of Demetrius I soon tried to regain his father's throne. In a three-way battle in 145, King Ptolemy VI of Egypt and Balas were both killed, leaving Demetrius II on the throne. He is remembered today mostly for his influence on Jewish history: He appointed Jonathan Maccabee the High Priest of the Jews -- in effect, the Prince of Judea; it was a major step toward Judea's regaining its independence.