South of their trade forts along the Gold Coast, the Portuguese established Luanda, which became the basis for the Portuguese colony of AP World History Chapter 20 South of their trade forts along the Gold Coast, the Portuguese established Luanda, which became the basis for the Portuguese colony of a. Kongo. b. Angola. c. Lesotho. d. Matabele. e. Kilwa. Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+