As time went by, histories were recorded and can be told in many different ways. Often there were series of dumb mistakes being made which led to the turning point in the course of history.
"Peloponesian War" will be the subject in which the retelling will be made so if you're expecting something serious, read Thucydides' work. The series of events in the war won't be covered in order so don't expect it to be told chronologically.
If not, oh well then...