12. Death of the regent Antipater, in the same year, (320;) he bequeaths the regency to his friend, the aged Polysperchon, to the exclusion of his own son Cassander. Antigonus now begins to unfold his ambitious plans; he endeavours vainly to win over Eumenes, who deceives him in the negotiations, and seizes the opportunity of leaving his mountain fastness. 13. Eumenes's plan to strengthen himself in Upper Asia; as he is on the way he receives tidings of his being appointed generalissimo of the royal troops. What better man could Polysperchon have selected for the office than he who in his conduct towards Antigonus exhibited so striking an example of attachment to the royal house? 14. Exertions of Eumenes to maintain himself in Lower Asia, ineffectual, the naval victory won by Antigonus over the royal fleet, commanded by Clitus, depriving him of the empire of the sea. He bursts into Upper Asia; where, in the spring, he unites with the satraps, who had taken arms against the powerful Seleucus of Babylon. 15. Antigonus following up the royal general, Upper Asia becomes the theatre of war. Victorious as was at first the stand made by Eumenes, neither valour nor talent were of any avail against the insubordination of the royal troops, and the jealousy of the other commanders. Attacked in winter quarters by Antigonus, he was, after the battle, delivered into the hands of his enemy by the mutinous Argyraspidae, who had lost their baggage: he was put to death, and in him the king's family lost its only loyal supporter. 16. Great changes had also taken place in the royal family. Her enemy Antipater having deceased, Olympias, invited by Polysperchon, who wished to strengthen himself against Cassander, had returned from Epirus, and put to death Arrhidaeus together with his wife, Eurydice: in the year following she was besieged in Pydna by Cassander, and being obliged to surrender, was in her turn executed; meanwhile Cassander held Roxana and the young king in his own power. 17. Third period, from the death of Eumenes to that of Antigonus.--The rout of Eumenes seemed to have established for ever the power of Antigonus in Asia; still animated with the fire of youth, though full of years, he saw himself revived in his son Demetrius, fond of boisterous revelry, but gallant and talented.--Even Seleucus thought it time to consult his safety by flying from Babylon into Egypt. 18. Changes introduced by Antigonus into the upper provinces; return to Asia Minor, where his presence seemed indispensable, by reason of the aggrandizement of Ptolemy in Syria and Phoenicia, of the Macedonian Cassander in Europe, of Lysimachus in Mysia, and the Carian Cassander in Asia Minor.--He repossesses himself of Phoenicia, a country of the first importance for the construction of a fleet. Siege of Tyre, 314-313: it lasts fourteen months; a proof that the city was certainly not razed by Alexander.