South Africa’s former president, Jacob Zuma, pleaded not guilty on Wednesday in a much-postponed corruption case dating back more than two decades.

The 79-year-old faces 16 charges of fraud, graft and racketeering relating to a 1999 purchase of fighter jets, patrol boats and military gear from five European arms firms for 30 billion rand, then the equivalent of nearly $5 billion.

Zuma — who at the time was president Thabo Mbeki’s deputy — is accused of accepting bribes totalling four million rand from one of the firms, French defence giant Thales.

Zuma was impassive as he faced the court in the eastern city of Pietermaritzburg, where numerous supporters and relatives were gathered.

Thales also pleaded not guilty to charges of corruption and money laundering.

Zuma’s plea concludes years of delay in the long-awaited trial, which many South Africans say will deliver the verdict of history on his turbulent presidency.

Prosecutors intend to call around 200 witnesses.

His successor, Cyril Ramaphosa, has vowed to stamp out graft, but is meeting resistance from pro-Zuma figures who command grassroots support in the ANC.