Thucydides, who authored the definitive account of the Peloponnesian War, started writing as soon as the conflict began, “...believing that it would be a great war, and more worthy of relation than any that had preceded it.” His account has also proved valuable for evaluating ensuing conflicts through to the present day. As Captain Alfred Thayer Mahan wrote, the Peloponnesian War showed that “strategic problems remain the same, though affected by tactical difficulties peculiar to each age.” The Athenian invasion of Sicily and the American experience in Iraq were not identical, but no two wars ever are. Instead, we must look at the overarching effects the military campaigns had on political objectives.