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.
Moreover sea power was not everything, and delay exhausted the financial reserves of the state, while financial considerations, as we have seen, were comparatively unimportant to the Peloponnesians.
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.