Bagoas soon perceived that his new protege, whose conduct he had reckoned on directing as he pleased, intended to govern for himself, and he therefore attempted to get rid of him; Bagoas was, however, betrayed by his accomplices, and compelled to drink the poison which he had prepared for Darius. These revolutions had distracted the attention of the court of Susa from the events which were taking place on the shores of the AEgean, and Philip had taken advantage of them to carry into effect the designs against Persia which he had been long meditating. After having been victorious against the Greeks, he had despatched an army of ten thousand men into Asia under the command of Parmenion and Attains (336). We may ask if it were not he who formed the project of universal conquest which was so soon to be associated with the name of his son Alexander. He was for the moment content to excite revolt among the cities of the AEgean littoral, and restore to them that liberty of which they had been deprived for nearly a century. He himself followed as soon as these lost children of Greece had established themselves firmly in Asia. The story of his assassination on the eve of his departure is well known (336), and of the difficulties which compelled Alexander to suspend the execution of the plans which his father had made. Darius attempted to make use of the respite thus afforded him by fortune; he adopted the usual policy of liberally bribing one part of Greece to take up arms against Macedonia--a method which was at first successful. While Alexander was occupied in the destruction of Thebes, the Rhodian general Memnon, to whom had been entrusted the defence of Asia Minor, forced the invaders to entrench themselves in the Troad. If the Persian fleet had made its appearance in good time, and had kept an active watch over the straits, the advance-guard of the Macedonians would have succumbed to the enemy before the main body of the troops had succeeded in joining them in Asia, and it was easy to foretell what would have been the fate of an enterprise inaugurated by such a disaster. Persia, however, had not yet learnt to seize the crucial moment for action: her vessels were still arming when the enemy made their appearance on the European shore of Hellespont, and Alexander had ample time to embark and disembark the whole of his army without having to draw his sword from the scabbard. He was accompanied by about thirty thousand foot soldiers and four thousand five hundred horse; the finest troops commanded by the best generals of the time--Parmenion, his two sons Nikanor and Philotas, Crater, Clitos, Antigonus, and others whose names are familiar to us all; a larger force than Memnon and his subordinates were able to bring up to oppose him, at all events at the opening of the campaign, during the preliminary operations which determined the success of the enterprise.