Mozambique–South Africa relations government. When Mozambique gained independence from Portugal in 1975, thousands of Mozambique-born Whites moved across the border to South Africa, the descendants of which are today Portuguese South Africans. The Shangaan or Tsonga people live on both sides of the Mozambique–South Africa border. Black movement between the two states existed to a large extent due to the possibility of employment of Mozambicans in the mines of South Africa. The cross-border remissions form an important part of the Mozambican economy. South Africa played an important role in the Mozambican Civil War in supporting RENAMO against the FRELIMO government. South Africa and
People's Republic of Mozambique preceding independence, FRELIMO consolidated its presence in the south and in urban areas. This was done through the work of militant groups ("grupos dinamizadores" or "dynamic groups"), which also included Mozambicans of Portuguese origin. The period prior to independence was also marked by the settling of scores and public trials against members FRELIMO who had strayed from the FRELIMO party line. "Traitors," "reactionaries," and real or suspected agents of the U.S. Central Intelligence Agency or PIDE, the Portuguese security agency. The Central Committee of FRELIMO adopted the constitution of the People's Republic of Mozambique on June 20, which established that