Sura was sent by the Roman governor of Macedonia to make head against the invaders. He won a naval battle and captured Sciathus, where all the spoils of the enemy were stored. [Sidenote: Conflicts between the Romans and the forces of Mithridates in Boeotia.] Then he marched into Boeotia, and, after a three days' engagement with the combined forces of Archelaus and Aristion, pushed Archelaus back to the coast. The war, perhaps, might have been ended here; but at this moment Lucullus came to announce the approach of Sulla, and to warn Sura that the war had been entrusted to him. So Sura retired to Macedonia. [Sidenote: Sulla lands in Epirus, 87 B.C., and marches on Athens.] Sulla had left Brundusium in 87, and, landing on the coast of Epirus, gathered what supplies he could from Aetolia and Thessaly, and marched straight for Athens. It was soon seen that the foundations of the empire of Mithridates were based on sand. The Boeotians at once submitted, including Thebes, which had joined the king. [Sidenote: Siege of the Piraeus and Athens.] Sulla then began two sieges, that of the Piraeus where Archelaus was, and that of Athens defended by Aristion. Archelaus had before shown himself an intrepid soldier, and he baffled all Sulla's efforts with equal ingenuity and courage. After an unsuccessful attempt to storm the walls, Sulla retired to Eleusis and Megara, thus keeping up his communications with Thebes and the Peloponnese, and set to work constructing catapults and other engines, and preparing an earthwork from which he meant to attack the wall with them. For these purposes he cut down the trees of the Academia and the Lyceum. He was kept informed of intended sallies by two slaves inside the town, who threw out leaden balls with words cut on them. But as fast as the earthwork rose Archelaus built towers on the walls opposite to it, and thence harassed the besiegers. [Sidenote: Battle at the Piraeus. Archelaus nearly taken.] He was also reinforced by Mithridates, and then came out and fought a battle which was for some time doubtful; but he was forced to retire at length with the loss of 2,000 men. He himself remained till the last. The gates were shut and he had to be drawn up by a rope over the wall.