[1] On 22 June 1890, however, Salvadoran President Francisco Menéndez Valdivieso was assassinated and his successor, Carlos Basilio Ezeta, pulled out of the treaty, effectively killing the union before it was even formed.

The United States sent warships to the coasts of El Salvador and Guatemala to protect American interests in both countries and put pressure on both governments to end the war which the two agreed to do so on 21 August 1890.

[1][2] On 23 May 1892, El Salvador, Guatemala, Honduras, and Nicaragua signed a peace treaty strengthen relations and "sentiments of brotherhood" and leave a possibility open for a future Central American union.

[1] Meanwhile, in El Salvador, Carlos Ezeta, who derailed the formation of a union previously, was challenged by 44 Salvadoran rebels on 29 April 1894 for the Presidency.

[3] Ten days the revolution, the nations of El Salvador, Honduras, and Nicaragua met to officially recreate the Central American republic.

"The signatory governments do not by the present treaty, renounce their autonomy and independence as regards the direction of their internal affairs, and the constitution and laws of each state shall remain in force so far as they are not inconsistent with the provisions of the present treaty.For the execution of the provisions contained in Article I, there shall be a diet composed of one member and one substitute, elected by each of the Congresses of the signatory republics for a term of three years.Neither Guatemala nor Costa Rica signed the treaty but they both did show interest in joining.

[1] On 13 November 1898, just 12 days after the constitution was ratified, Salvadoran President Rafael Antonio Gutiérrez was overthrown by Tomás Regalado Romero, a fellow member of the revolution which had ousted Ezeta 4 years earlier.

"[7] The Executive Federal Council attempted to come to a compromise with Regalado by offering El Salvador greater autonomy but Regalado refused, and when the military leaders of Honduras and Nicaragua failed to take military action against El Salvador, the Executive Federal Council declared the dissolution of the nation on 29 November 1898.

One last attempt would follow from 1921 to 1922 between Costa Rica, El Salvador, Guatemala, and Honduras, but ultimately fell apart due to the lack of support from Nicaragua.