This act led to an open rupture. Octavius, by authority of the senate, declared war, not against Antony, but against Cleopatra. Antony was at length roused. He gathered an army in haste, passed to Ephesus and Athens, and everywhere levied men and collected ships. A last and great struggle for the supreme headship of the Roman world was at hand. Octavius was not skilled in war, but he had in Agrippa one of the ablest of ancient generals, and was wise enough to trust all warlike operations to him. Antony had strongly fortified himself at Actium, on the west coast of Greece, while the strong fleet he had gathered lay in its spacious bay. Here took place one of the decisive battles of the world's history. Antony had made the fatal mistake of bringing Cleopatra with him. Under her advice he played the part of a poltroon instead of a soldier. His chief officers, disgusted by his fascination, deserted him in numbers, and, yielding to her urgent fears, he resolved to fly with the fleet and abandon the army. In this act of folly he failed. A strong gale from the south kept the fleet for four days in the harbor. Then the ships of Octavius came up, and the two fleets joined battle off the headland of Actium. The ships of Antony were much larger and more powerful than those of Octavius. Little impression was made on them by the light Italian vessels, and had Antony been a soldier still, or Cleopatra possessed as much courage as guile, the victory might well have been theirs. But battle was no place for the pleasure-loving queen. Filled with terror, she took advantage of the first wind that came, and sailed hastily away, followed by sixty Egyptian ships. The moment Antony discovered her flight he gave up the world for love. Springing from his ship-of-war into a light galley, he hastened in wild pursuit after his flying mistress. Overtaking her vessel, he went on board, but seated himself in morose misery at a distance, and would have nothing to do with her. Ruin and despair were now his mistresses. Their commander fled, the ships fought on, and yielded not till the greater part of them were in flames. Before night they were all destroyed, and with them perished most of those on board, while all the treasure was lost. When the army heard of Antony's desertion the legions went over to the conqueror. That brief sea-fight had ended the war. For a year Octavius did not trouble his rival. He spent the time in cementing his power in Greece and Asia Minor. Cleopatra tried her fascinations on him, as she had on Caesar and Antony, but in vain. She sought to fly to some place beyond the reach of Rome, but Arabs destroyed her ships. At length Octavius came. Antony made some show of hostility, but Cleopatra betrayed the fleet to his rival and all resistance ended. Octavius entered the open gates of Alexandria as a conqueror.