By the early 18th century the Mangbetu had consisted of a number of small clans who, from southward migrations, had come in contact with a number of northward-migrating Bantu-speaking tribes among whom they lived interspersed. In the late 18th century a group of Mangbetu-speaking elites, mainly from the Mabiti clan, assumed control over other Mangbetu clans and many neighboring Bantu-speaking tribes. It is likely that their knowledge of iron and copper forgery, by which they made weapons and fine ornaments, gave them a military and economic advantage over their neighbors.[3]