Nectanebo had spared no pains in preparing effectively to receive his foe. He chose as his coadjutor the Athenian Chabrias, whose capacity as a general had been manifested by recent events, and the latter accepted this office although he had received no instructions from his government to do so, and had transformed the Delta into an entrenched camp. He had fortified the most vulnerable points along the coast, had built towers at each of the mouths of the river to guard the entrance, and had selected the sites for his garrison fortresses so judiciously that they were kept up long after his time to protect the country. Two of them are mentioned by name: one, situated below Pelusium, called the Castle of Chabrias; the other, not far from Lake Mareotis, which was known as his township.* * Both are mentioned by Strabo; the exact sites of these two places are not yet identified. Diodorus Siculus, describing the defensive preparations of Egypt, does not state expressly that they were the work of Chabrias, but this fact seems to result from a general consideration of the context. [Illustration: 291.jpg PHARNABAZUS] Drawn by faucher-Gudin, from a coin in the _Cabinet des Medailles_. The Persian generals endeavoured to make their means of attack proportionate to the defences of the enemy. Acre was the only port in Southern Syria large enough to form the rendezvous for a fleet, where it might be secure from storms and surprises of the enemy. This was chosen as the Persian headquarters, and formed the base of their operations. During three years they there accumulated supplies of food and military stores, Phoenician and Creek vessels, and both foreign and native troops. The rivalries between the military commanders, Tithraustes, Datames, and Abrocomas, and the intrigues of the court, had on several occasions threatened the ruin of the enterprise, but Pharnabazus, who from the outset had held supreme command, succeeded in ridding himself of his rivals, and in the spring of 374 B.C. was at length ready for the advance. The expedition consisted of two hundred thousand Asiatic troops, and twenty thousand Greeks, three hundred triremes, two hundred galleys of thirty oars, and numerous transports. Superiority of numbers was on the side of the Persians, and that just at the moment when Nectanebo lost his most experienced general. Artaxerxes had remonstrated with the Athenians for permitting one of their generals to serve in Egypt, in spite of their professed friendship for himself, and, besides insisting on his recall, had requested for himself the services of the celebrated Iphicrates. The Athenians complied with his demand, and while summoning Chabrias to return to Athens, despatched Iphicrates to Syria, where he was placed in command of the mercenary troops. Pharnabazus ordered a general advance in May, 374 B.C.,* but when he arrived before Pelusium, he perceived that he was not in a position to take the town