The Twa, Hutu and Tutsi peoples have lived in Burundi for at least 500 years. For more than 200 of those years, Burundi was an independent kingdom, until the beginning of the 20th century, when Germany ruled the region. After the First World War and Germany's defeat, the League of Nations "mandated" the territory to Belgium. After the Second World War this transformed into a United Nations Trust Territory. Both Germans and Belgians ruled Burundi and Rwanda as a European colony known as Ruanda-Urundi. Burundi and Rwanda had never been under common rule until the time of European invasion of Africa.