The Greek Heroic Age is defined as the period between the coming of the Greeks to Thessaly and the Greek return from Troy. It was demarcated as one of the five Ages of Man by Hesiod. The period spans roughly six generations; the heroes denoted by the term are superhuman, though not divine, and are celebrated in the literature of Homer. The Greek heroes can be grouped into an approximate chronology, based on the great meet-up events of the Argonautic expedition and the Trojan War.