Complex sentence: In 170 BC, Antiochus IV Epiphanes invaded Egypt and deposed Philometor, and his younger brother (later Ptolemy VIII Euergetes II) was installed as a puppet king.
Split into simpler sentences: In 170 BC, Antiochus IV Epiphanes invaded Egypt and deposed Philometor. Antiochus younger brother (later Ptolemy VIII Euergetes II) was installed as a puppet king.