In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: One leading political group in this country signaled its changing affinity for Communism by adding and then dropping the phrase party of labor from its name. Militant groups in this country were founded by Holden Roberto and Agostinho Neto in the 1950s, though the National Front for Liberation became less relevant by the 1990s, ceding the leftist position in national politics to the MPLA. Its civil war was briefly ended by a pact signed in another country, the Lusaka Accord, but clashes resumed and in 2002, government troops killed Jonas Savimbi, the leader of UNITA. A proxy war between Cuba and South Africa had previously raged in, for 10 points, what former Portuguese colony on Africas south Atlantic coast
A:
History