The Belgians, however, preserved many of the kingdom's institutions; the Burundian monarchy succeeded in surviving into the post-colonial period. Following the Second World War, Ruanda-Urundi was classified as a United Nations Trust Territory under Belgian administrative authority. During the 1940s, a series of policies caused divisions throughout the country. On 4 October 1943, powers were split in the legislative division of Burundi's government between chiefdoms and lower chiefdoms. Chiefdoms were in charge of land, and lower sub-chiefdoms were established. Native authorities also had powers. In 1948, Belgium allowed the region to form political parties. These factions contributed to Burundi gaining its independence from Belgium, on 1 July 1962.