The struggle for Namibia's independence from the regional perspective of southern Africa over a period of 45 years from 1945 to 1990 is the subject of this detailed study, which is based on extensive research in the region. This regional focus on Namibia's decolonization complements existing approaches to the study of Namibia's decolonization, which emphasize either the internal dynamics of occupation, resistance and collaboration inside the country, or the international diplomatic efforts as a result of Namibia's unique position in United Nations diplomacy. The work throws light on issues such as the relationship between Namibian nationalist movements and other liberation movements of southern Africa in the light of Soviet-Chinese rivalry in the 1960s. It also analyzes the role of independent southern African states in Namibia's search for independence. In particular, it examines frontline state diplomacy during the negotiations and subsequent implementation of Security Council resolution 435 of 1978. Finally, the study discusses the regional war between Angola and South Africa in the light of the South African "Total National Strategy", Cuban internationalism, the changing policies of the Soviet Union and the American policy of "linkage" in the 1980s, which set the conditions for completing Namibia's decolonization during the final years of the Cold War.