on them, which allowed the Spartan elite forces to defeat them. The result was a complete victory for the Spartans, which rescued their city from the brink of strategic defeat. The democratic alliance was broken up, and most of its members were reincorporated into the Peloponnesian League. With its victory at Mantinea, Sparta pulled itself back from the brink of utter defeat, and re-established its hegemony throughout the Peloponnese. In the summer of 416 BC, during a truce with Sparta, Athens invaded the neutral island of Melos, and demanded that Melos ally with them against Sparta, or be destroyed. The Melians rejected this, so the Athenian army laid siege to their city and eventually captured it in the winter. After the city's fall, the Athenians executed all the adult men, and sold the women and children into slavery. Sicilian Expedition (415–413 BC) In the 17th year of the war, word came to Athens that one of their distant allies in Sicily was under attack from Syracuse, the main city of Sicily. The people of Syracuse were ethnically Dorian (as were the Spartans), while the Athenians, and their ally in Sicilia, were Ionian. The Athenians felt obliged to help their ally. They also held visions, rallied on by Alcibiades, who ultimately led an expedition, of conquering all of Sicily. Syracuse was not much smaller than Athens, and conquering all of Sicily would bring Athens immense resources. In the final preparations for departure, the hermai (religious statues) of Athens were mutilated by unknown persons, and Alcibiades was charged with religious crimes. Alcibiades demanded that he be put on trial at once, so that he can defend himself before the expedition. However, the Athenians allowed Alcibiades to go on the expedition without being tried (many believed in order to better plot against him). After arriving in Sicily, Alcibiades was recalled to Athens for trial. Fearing that he would be unjustly condemned, Alcibiades defected to Sparta and Nicias was placed in charge of the mission. After his defection, Alcibiades claimed to the Spartans that the Athenians planned to use Sicily as a springboard for the conquest of all of Italy and Carthage, and to use the resources and soldiers from these new conquests to conquer the Peloponnese. The Athenian force consisted of over 100 ships and some 5,000 infantry and light-armored troops. Cavalry was limited to about 30 horses, which proved to be no