The military was deployed to four South African provinces, including KwaZulu-Natal where former President Zuma is from.
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South Africa’s president wants a second term and is seen as the party’s strongest candidate despite a farm scandal.
Zuma was sentenced to 15 months for ignoring a court order to testify at an inquiry into corruption during his tenure.
The officials are facing charges of fraud and breaching public finance regulations linked to a 2015 procurement scandal.