He taught them that Athens might thus reap the fruit of her zealous devotion to maritime affairs ever since the invasion of the Medes; "she had not, indeed, perfected herself; but the reward of her superior training was the rule of the sea--a mighty dominion, for it gave her the rule of much fair land beyond its waves, safe from the idle ravages with which the Lacedaemonians might harass Attica, but never could subdue Athens." Athens accepted the war with which her enemies threatened her rather than descend from her pride of place; and though the awful visitation of the plague came upon her, and swept away more of her citizens than the Dorian spear laid low, she held her own gallantly against her enemies. If the Peloponnesian armies in irresistible strength wasted every spring her corn-lands, her vineyards, and her olive groves with fire and sword, she retaliated on their coasts with her fleets; which, if resisted, were only resisted to display the preëminent skill and bravery of her seamen. Some of her subject allies revolted, but the revolts were in general sternly and promptly quelled. The genius of one enemy had indeed inflicted blows on her power in Thrace which she was unable to remedy; but he fell in battle in the tenth year of the war, and with the loss of Brasidas the Lacedaemonians seemed to have lost all energy and judgment. Both sides at length grew weary of the war, and in 421 a truce for fifty years was concluded, which, though ill kept, and though many of the confederates of Sparta refused to recognize it, and hostilities still continued in many parts of Greece, protected the Athenian territory from the ravages of enemies, and enabled Athens to accumulate large sums out of the proceeds of her annual revenues. So also, as a few years passed by, the havoc which the pestilence and the sword had made in her population was repaired; and in 415 Athens was full of bold and restless spirits, who longed for some field of distant enterprise wherein they might signalize themselves and aggrandize the state, and who looked on the alarm of Spartan hostility as a mere old-woman's tale. When Sparta had wasted their territory she had done her worst; and the fact of its always being in her power to do so seemed a strong reason for seeking to increase the transmarine dominion of Athens. The West was now the quarter toward which the thoughts of every aspiring Athenian were directed. From the very beginning of the war Athens had kept up an interest in Sicily, and her squadron had, from time to time, appeared on its coasts and taken part in the dissensions in which the Sicilian Greeks were universally engaged one against the other. There were plausible grounds for a direct quarrel, and an open attack by the Athenians upon Syracuse.