Davāzdah Rokh (Persian: دَوازدَه رُخ) (Twelve combats) is a story in Shahnameh. This relatively long story (almost 2,500 verses) is one of the finest and most famous stories of Shahnameh.
It takes place in the border of Iran and Turan, where a number of Iranian heroes fight with a number of Turanian heroes. In all cases, Iranian heroes defeat their Turanian competitors. Goudarz is the chief of Iranian heroes and Piran Viseh is the chief of Turanian heroes. The battle begins when Piran's brother, Houman, challenges the Iranians and is killed by Bizhan in a single combat. The two army then fight together but the war has no winner. Finally they agree on pitched battles between the heroes of the two army. At the end, Goudarz kills Piran and the war ends. However, Gostaham, who has not been chosen by Kay Khosrow to fight with Turanians, chase Lahhāk and Faršēd, brothers of Piran, and kills them. However he himself was severely injured and Bizhan takes him to Kay Khosrow and the latter saves his life by tying a panacean bead around his arm. The war ends with the death of Afrasiab, Turan's king. In some manuscripts of Shahnameh the story is entitled az Yazdah Rokh (Eleven combats), not counting the last fight between Gostaham and Piran's brothers.
According to shahnameh the place of war was in the area near Zibad castle or black mountain of Gonabad in Iran state of Greater Khorasan .[1]
the war was ended with the victory of Iran and a festival was held on the honor of king Kai Khosrow and Goudarz chief army.