By the late 1950s, highlife music had become the dominant popular music idiom in many West African countries, including Ghana, Nigeria and Sierra Leone. In southern Africa, the two most important popular forms are the chimurenge music of Zimbabwe and the mbaqanga of South Africa. These two styles were closely associated with the struggle for independence and majority rule in these two countries. Chimurenga, which also combines traditional songs and rhythms with Western instruments, was used by members of the liberation groups in Zimbabwe to mobilize an African resistance against white minority rule. Similarly the mbaqanga, in its use of Western instruments, jazz idioms and traditional rhythms, was closely connected with twentieth century political and cultural history of South Africa, defined largely by the imposition of apartheid and how the racist policy was resisted by South Africans (see Discover Video).