These are traditional Fulani leaders in the 1967 Independence Day Parade in Niamey, Niger. The Fulani are the traditional livestock people of the Sahel (the roughly 12 to 25 inch rainfall belt). In addition, there are longterm sedentary Fulani, Guinea being a country in which there is a large population. They were, and still are, instrumentel in the spread of Islam in Sub-Saharan West Africa.
As seen in the photo, they attach a lot of importance to their horses. The horses are well decorated and are sometimes of noteworthy genetic heritage.
The Fulani also fully have their place in both leadership and operational positions in government and businesses of the Sahelian countries. (The Sahel also has a country or political definition. In this case, it is Senegal, Maruitania, Mali, Burkina Faso, Niger, and Chad. It has sometimes included Guinea and the Gambia).