Before revision: The tradition is dominated by Hausa fisherman and butcher caste groups, and over the last century evolved from clans of these professions traveling to farm villages at harvest time, integrating a fighting challenge by the outsiders into local harvest festival entertainment.
After revision: The tradition is dominated by Hausa fisherman and butcher caste groups, and over the 20th century evolved from clans of these professions traveling to farm villages at harvest time, integrating a fighting challenge by the outsiders into local harvest festival entertainment.