At the opening of spring the operations against Syracuse began in good earnest. The first object of Nicias was to obtain possession of the heights of Epipolae, for since the construction of the new Syracusan wall it had become impossible for him to draw his line of blockade from the side of the Great Harbour. His preparations were already far advanced, when the Syracusan generals resolved to anticipate him, by occupying all the approaches to Epipolae. With this intention they issued an order for a full muster of troops in a meadow by the Anapus, and after a general review and inspection of arms they appointed a picked body of six hundred hoplites to guard the heights of Epipolae, and hold themselves ready for any other pressing service. But the precaution was taken too late. On the night before the review Nicias set sail with his whole army from Catana, and landed at a place called Leon, not more than six or seven furlongs from the northern side of Epipolae. The fleet then took up its station in the sheltered water behind the peninsula of Thapsus, while the land forces, advancing at a run, crossed the level ground, and then, breasting the ascent, gained the summit of Euryelus. News of their approach presently reached the Syracusans, who were still mustered by the Anapus, and breaking off the review, they marched in haste towards Epipolae, hoping still to dislodge the Athenians from their position. But in their rapid advance over a distance of nearly three miles their ranks became disordered, and their attack was so straggling and ineffectual that they were easily repulsed, and driven back with considerable loss into the town. On the following day Nicias led his troops down the slope, and offered battle before the walls of Syracuse; but the challenge was declined, and the Syracusans remained within their defences, leaving the Athenians in undisputed possession of Epipolae.