Verethragna (later Bahram) is the yazata of victory, whose hymn is Yasht 14 of the Avesta: he comes to the worshipper in ten successive forms - wind, bull, white horse, camel, boar, a youth of fifteen, raven, ram, buck and man - and in each he is the power that breaks the lie. He is the patron of the righteous fighter rather than of war as such, and the highest grade of Zoroastrian temple fire, the Atash Bahram, is named for him. His day is Bahram, the twentieth day of the Zoroastrian month.
Modern Practice
Invoked before a fight that must be fought - legal, physical or moral - and for courage and protection; modern correspondence work uses him for the strength to face what cannot be avoided, without the cruelty the tradition itself rejects.