Saed News: *Massoud Mirza Zell-e Sultan* was the eldest son of *Naser al-Din Shah*, who held power in the city of Isfahan for over thirty years as its governor.
According to the history section of Saed News, Zell-e Sultan had a special military force called the Fowj-e Jalali (Jalali Regiment), a glimpse of whose training can be seen in the photo below, taken in the city of Isfahan.
Training of the Forces of Massoud Mirza Zell-e Sultan