The treaty was negotiated by representatives of the Salvadoran government, the rebel movement FMLN, and political parties, with observers from the Catholic Church and United Nations.
On December 31, 1991, the government and the FMLN initialed a preliminary peace agreement under the auspices of UN Secretary-General Javier Pérez de Cuéllar. The final agreement was signed in Mexico City on January 16, 1992 at the Castillo de Chapultepec.
A nine-month cease-fire took effect February 1, 1992, and was never broken.
The Accords included a seventy percent reduction of the armed forces, the dissolution of the rapid deployment forces, the National Guard, the National Police, the Treasury Police and the transfer of the state intelligence agencies to the presidency of the Republic.