While Eurymedon was sailing, Gylippus's 80 Syracusan ships, including 35 triremes, attacked 60 of the Athenian ships (25 of which were triremes) in the harbour. Gylippus commanded a simultaneous attack on the Athenian land forces. In the harbour, the Athenians were successful, losing only three ships while the Syracusans lost eleven. However, Gylippus defeated the Athenians on land and captured two Athenian forts. Afterwards, Gylippus succeeded in convincing all the neutral cities on Sicily to join him, but the allies of Athens killed 800 Corinthians, including all but one of the Corinthian ambassadors.