What were the geography issues they had to overcome in the Peloponnesian War?
Athens went to war on this basis, but became too adventurous in trying to reach out to Sicily, where it suffered heavy but not fatal losses. Otherwise it worked well enough until Persia provided the funds for the Spartan alliance to field a navy matching the Athenian, and after its navy was defeated, Athens could not collect contributions to build and man another fleet, when geography turned against it. Athens, shorn of its empire, became a single beseiged city with no chance of support from its overseas allies.
