The commands of both fleets changed hands after Notium. Because of term limits on the position of navarch, Lysander was replaced by Callicratidas; on the Athenian side, the fall of Alcibiades also brought down his friends Thrasybulus and Theramenes, and the overall command was given to Conon. Over the next year, the fleets clashed twice, first in a battle where, with twice as many ships as Conon, Callicratidas defeated the Athenians and trapped them in Mytilene; an Athenian relief fleet then decisively defeated and killed Callicratidas at Arginusae. These Athenian victories proved useless, however, for in 405 BC Lysander returned to unofficial command and destroyed the Athenian fleet at Aegospotami, thus ending the Peloponnesian War with Sparta the victor.