On land the Peloponnesians were superior: they had at least 30,000 hoplites not including 10,000 from Central Greece and Boeotia: these soldiers were Highly trained.
The Peloponnesians had no reserve and no fixed revenue assessment.
In 429 the Peloponnesians were deterred by the plague from invading Attica and laid siege to Plataea in the interests of Thebes.
Thus in 424 the Athenians had seriously damaged the prestige of Sparta, and broken Corinthian supremacy in the north-west, and the Peloponnesians had no fleet.
Pharnabazus, weary of bearing the whole cost of the war for the Peloponnesians, agreed to a period of truce so that envoys might visit Susa, but at this stage the whole position was changed by the appointment of Cyrus the Younger as satrap of Lydia, Greater Phrygia and Cappadocia.