Arsinoe IV (65-47 BC) was the last Ptolemaic Pharaoh of Egypt. She was most notable in the Collapse of the Ptolemaic Kingdom , fighting the Caesarians, her sister Cleopatra VII , and finally Mithridates the Great . She certainly possessed political skill, but the outdated and poorly-motivated Ptolemaic Phalagnites proved no match for Surena 's juggernaut. After the annihilation of the Ptolemaic army and the deaths of Achillas
and Ganymedes at the Battle of Gaza she, along with Ptolemy XIII
and Theodotus of Chios committed suicide in Alexandria.