In May 1986, a summit meeting, Esquipulas I, took place, attended by the five Central American presidents. On 15 February 1987, Costa Rican President Óscar Arias submitted a Peace Plan which evolved from this meeting. During 1986 and 1987, the Esquipulas Process was established, in which the Central American heads of state agreed on economic cooperation and a framework for peaceful conflict resolution. The Esquipulas II Accord emerged from this and was signed in Guatemala City by the five presidents on 7 August 1987.