In January 1999, world leaders intervened diplomatically to promote negotiations between the RUF and the government. The Lome Peace Accord, signed on 27 March 1999, was the result. Lome gave Foday Sankoh, the commander of the RUF, the vice presidency and control of Sierra Leone's diamond mines in return for a cessation of the fighting and the deployment of a UN peacekeeping force to monitor the disarmament process. RUF compliance with the disarmament process was inconsistent and sluggish, and by May 2000, the rebels were advancing again upon Freetown.