 Complete the following phrase:  The Southern Africa Non-aggression Pact required signatory states to ensure that no individual or organization attacked a signatory state from signatory soil. Presidents Jose Eduardo dos Santos of Angola, Mobutu Sese Seko of Zaire, and Kenneth Kaunda of Zambia signed the agreement on October 14, 1979. The signatories also signed a treaty on transportation and communication cooperation the same day. The non-aggression pact largely held together until Angola, along with most of the rest of Southern Africa, invaded the Democratic Republic of the Congo in 1996 during the 