In March 1981, widespread violence took place in Bangui following elections, after Operation Caban led the French to drop Bokassa (who had begun to call himself Emperor Bokassa I), and replaced him with David Dacko. Opponents of the President met in Bangui and were forced to flee the country. After returning voluntarily to Bangui in the autumn of 1986, Bokassa went on trial. Initially faced with the death penalty, in February 1988 he was instead sentenced to life imprisonment. His successor was General André Kolingba, army chief of staff of Dacko's army, who took over control from the local French military on 1 September 1981 under the pretext that the country was heading towards civil war. Although he attempted to combat corruption and control the national economy, he was unable to achieve his reforms. By the middle of the 1980s the country's economic situation had deteriorated as 80% of the revenue went towards meeting the salaries of the staff.