Task: Text Categorization
Input (English): A focal point of engagements in this conflict was the fort at Labdalum, and it culminated in a slaughter at the Assinarus River. Walls of circumvallation were built outward from the Epipolae plateau, and Lamachus was killed during a raid on a counter-wall. Superstition over a lunar eclipse caused the attackers to fail to retreat when they had the chance, after which the survivors were left to die in nearby quarries. The official pretext of this conflict was to attack Selinus in support of Segesta. Led by Nicias, it began with the defection of its instigator to Sparta and ended with a disastrous siege of Syracuse. For 10 points, name this phase of the Peloponnesian War supported by Alcibiades, an Athenian expedition to an Italian island.
Output (English): History