Why it's the capital
Luanda grew into Portugal's main base on this coast and was the capital of Portuguese Angola. When Angola became independent in 1975, it remained the capital of the new country.
Capital of AngolaLuanda lies on Angola's northern Atlantic coast, around a natural harbour, about 60 km north of the mouth of the Kwanza, the country's longest river.
Luanda grew into Portugal's main base on this coast and was the capital of Portuguese Angola. When Angola became independent in 1975, it remained the capital of the new country.
Start at the mouth of the Congo River and follow Angola's coastline south: Luanda is on the coast about a quarter of the way down to the border with Namibia.
Sources: Wikipedia: Luanda, Wikipedia: Portuguese Angola, Wikipedia: Cuanza River, Wikipedia: Angola