The Cámara de Diputados accepts the resignations of Madero and Pino Suárez. Pedro Lascuráin, Secretario de Relaciones Exteriores, becomes interim president and names Victoriano Huerta Secretario de Gobernación. Within the hour Lascuráin resigns and Huerta immediately occupies the presidency.

Madero and Pino Suárez are murdered in transit from the National Palace to the federal penitentiary.

Woodrow Wilson sworn in as president of the United States, succeeding President Taft.

Ignacio L. Pesqueira, governor of Sonora, repudiates Huerta and names Álvaro Obregón as commander of his armed forces.

Venustiano Carranza, former governor of Coahuila, issues the Plan de Guadalupe, repudiating Huerta and calling for armed revolt. Carranza assumes the post of Primer Jefe del Ejército Constitucionalista.

Revolutionary forces capture and occupy the cities of Matamoros, Zacatecas, and Durango.

General Felipe Ángeles repudiates Carranza in Sonora.

Huerta dissolves Congress and arrests 84 diputados.

Revolutionary forces occupy Culiacán, Sinaloa, and Ciudad Victoria, Tamaulipas.

President Woodrow Wilson lifts the embargo on weapons going to Mexico, an action favoring the revolutionaries.

Forces under the command of Francisco Villa capture the city of Torreón, Coahuila.

Sailors of the U.S. warship Dolphin are arrested by authorities in the port of Tampico.

United States Navy occupies port of Veracruz in order to impede the German cargo ship Ipiranga from unloading weapons for the Huerta government. Numerous dead and wounded result on both sides. Mexico breaks diplomatic relations with the United States on 24 April 1914, leaving its diplomatic interests in care of Spain.

Argentina, Brazil, and Chile offer to help resolve the dispute between Mexico and the United States and the occupation by the latter of the port of Veracruz.

Revolutionary forces occupy the cities of Tampico, Tuxpan, Tepic, and Saltillo.

Meeting at Niagara Falls between Mexico and the United States through the good offices of Argentina, Brazil, and Chile.

Revolutionary forces under Francisco Villa capture the city of Zacatecas.

Revolutionary forces occupy Guadalajara, Acapulco, Guaymas, San Luis Potosí, Colima, Aguascalientes, Guanajuato, Querétaro, and Morelia.

Victoriano Huerta resigns the presidency and leaves for exile. Francisco S. Carbajal, Secretary of Foreign Relations, becomes interim president.