Complex sentence: Mandela met with Afrikaner politicians and generals, including P. W. Botha, Pik Botha and Constand Viljoen, persuading many to work within the democratic system, and with de Klerk convinced Inkatha's Buthelezi to enter the elections rather than launch a war of secession.
Split into simpler sentences: Mandela met with Afrikaner politicians and generals, including P. W. Botha, Pik Botha and Constand Viljoen, persuading many to work within the democratic system. With de Klerk, he also convinced Inkatha's Buthelezi to enter the elections rather than launch a war of secession.