Vieira was re-elected for another four-year term as President of PAIGC in mid-May 1998 at the party's sixth congress, with 438 votes in favor, eight opposed, and four abstaining; the post of Secretary-General was abolished at this congress. An outbreak of civil war in June 1998 eventually led to the ousting of Vieira in May 1999. A few days later, former Prime Minister Manuel Saturnino da Costa was named acting President of the PAIGC on 12 May 1999. Vieira was expelled from PAIGC at a party congress in September 1999 for "treasonable offences, support and incitement to warfare, and practices incompatible with the statutes of the party". Francisco Benante, the leader of reformists within the party and the only civilian in the transitional military junta, was elected as the President of PAIGC at the end of the congress on 9 September 1999. Benante's candidacy was supported by the junta, and he received 174 votes against 133 votes for the only opposing candidate.