The Luba people or Baluba are an ethno-linguistic group indigenous to the south-central region of the Democratic Republic of the Congo. The majority of them live in this country, residing mainly in Katanga, Kasai and Maniema. The Baluba Tribe consist of many sub-groups or clans who speak various dialects of Luba (e.g. Kiluba, Tshiluba) and other languages, such as Swahili. The Baluba developed a society and culture by about the 400s CE, later developing a well-organised community in the Upemba Depression known as the Baluba in Katanga confederation. Luba society consisted of miners, smiths, woodworkers, potters, crafters, and people of various other professions. Their success and wealth grew greatly over time, but this also caused their gradual decline to marauding bands of slavers, robbers, and terrorists from among Portuguese and Omani led or influenced invasions. History Archaeological evidence proves that the Baluba had settlements around the lakes and marshes of the Upemba Depression by the 5th century CE. The evidence suggesting an advanced Iron Age society by then comes from multiple sites, and these are among the best developed archaeological records in Central Africa. The Kamilambian, Kisalian and Kabambian series of evidence has been dated to be from 5th to 14th-century, suggesting a settled stable Luba culture over many centuries. Of these, the Kisalian period (8th to 11th century) pottery and utensils found, were crafted with extraordinary excellence. The finds dated to pre-8th century by modern dating methods are iron objects or pottery, thereafter copper objects appear. The archaeological studies suggest that the Luba people lived in villages, in homes made of reeds and wattle, around the shores of numerous streams and lakes found in the Upemba Depression of Central Africa. This Depression has been historically flooded from the water runoff from southern Shaba highlands for parts of the year, its water bodies filled with papyrus islands and floating vegetation, the region drying out after rains ended. As a community, the Luba people constructed dams and dikes as high as 6 to 8 feet using mud, papyrus and other vegetation, to improve the marshy soil conditions for agriculture and stock fish during the long dry season. With settled communities, states Thomas Reefe – a professor of History, the Luba people had developed metal extraction techniques, skills to make utilitarians products from them and "high degree of craft specialization". The metal working techniques in use by the early Luba people included