This began primarily with the formation of a regimented system in which different classes of the Gasa/Gaza kingdom were separated. The conquered Ndau, Vakhosa, and Vahlave peoples were regimented under the Mavulandlela regiment and taught Nguni/Ndwandwe battle tactics. Many of the subjugated peoples (including the Ndau, Shona, Nguni, and Tsonga) were incorporated into the Gaza empire. This created a conflict between the Shangaan tribe and the long-existing Tsonga people, where the Gaza Shangaan empire was seen as an invading force and a threat to the cultural institutions of the Tsonga people and other nearby tribes.