Kigali of what is now Rwanda were the Twa, a group of aboriginal pygmy hunter-gatherers who settled the area between 8000 and 3000 BC and remain in the country today. They were followed between 700 BC and 1500 AD by a number of Bantu groups, including the Hutu and Tutsi, who began clearing forests for agriculture. According to oral history the Kingdom of Rwanda was founded in the 14th century on the shores of Lake Muhazi, around east of modern Kigali. At that time Rwanda was a small state in a loose confederation with larger and more powerful neighbours, Bugesera and
Kigali part of the upper headwaters of the Nile, forms the western and southern borders of the administrative city of Kigali, although this river lies somewhat outside the built-up urban area. The largest river running through the city is the Nyabugogo River, which flows south from Lake Muhazi before flowing west between Mount Kigali and Mount Jali, and draining into the Nyabarongo. The Nyabugogo is fed by various smaller streams throughout the city, and its drainage basin contains most of Kigali's territory, other than areas in the south which outflow directly to the Nyabarongo. The rivers are flanked by wetlands, which