Vassalage as a political system was practised by the
Answer Details
Vassalage was a political system where a powerful person or group (the suzerain) would grant protection to a weaker person or group (the vassal) in exchange for their loyalty and service. Among the options given, vassalage was practiced by the Haua Fulani. The Haua Fulani were a group of people in West Africa who established a powerful empire in the 19th century through the use of vassalage. They would grant protection to weaker groups in exchange for their loyalty and tribute, which helped to expand their power and influence.