Although there were problems and delays in the original schedule worked out in the December 1991 New York and January 1992 Mexico City agreements, the process was eventually successful, thanks in no small part to the ONUSAL presence. From February until 15 December 1992 the FMLN was concentrated into 15 camps under ONUSAL supervision, where they slowly demobilized and turned in their weapons for disposition by ONUSAL. Simultaneously, key units of the Salvadoran armed forces also demobilized and officers identified with human rights violations were purged from the military.