Incumbents

Aguascalientes: Felipe Nieto y del Portillo/Felipe Cosio
Chiapas: Jerónimo Cardona
Chihuahua:
Coahuila: Rafael Vázquez/José María de Aguirre González/Santiago Rodríguez del Bosquea
Durango:
Guanajuato:
Guerrero:
Jalisco: Antonio Escobedo/Juan Nepomuceno Cumplido/José María Yáñez/Joaquín Angulo
State of Mexico:
Michoacán:
Nuevo León:
Oaxaca:
Puebla:
Querétaro: Julián Juvera
San Luis Potosí:
Sinaloa:
Sonora:
Tabasco:
Tamaulipas: Juan Martin de la Garza Flores/Manuel Núñez Ponce/Manuel Saldaña/Francisco Vital Fernandez
Veracruz: Manuel Gutiérrez Zamora/José de Emparán/Manuel Gutiérrez Zamora
Yucatán:
Zacatecas:

Events

This section needs expansion. You can help by adding to it. (October 2010)

April 25 – Mexican–American War: Open conflict begins over border disputes of Texas' boundaries.^[1]
May 8 – Mexican–American War – Battle of Palo Alto: Zachary Taylor defeats a Mexican force north of the Rio Grande at Palo Alto, Texas in the first major battle of the war.
May 9 – Mexican–American War – Battle of Resaca de la Palma in Brownsville, Texas
May 13 – Mexican–American War: The United States declares war on Mexico.

June 10 – Mexican–American War: The California Republic declares independence from Mexico.
June 14 – Bear Flag Revolt: American settlers in Sonoma, California start a rebellion against Mexico and proclaim the California Republic.
July 7 – Acting on instructions from Washington, DC, Commodore
August 6 – José Mariano Salas assumed the presidency as provisional president.
August 22 – President José Mariano Salas decreed the Mexican Constitution of 1824 in effect again.^[2]
September 21-24 – Battle of Monterrey

This section is empty. You can help by adding to it. (July 2010)

^ K. Jack Bauer (1993). Zachary Taylor: Soldier, Planter, Statesman of the Old Southwest. Louisiana State University Press. p. 149. ISBN 9780807118511. Archived from the original on May 14, 2016. Retrieved October 17, 2015.
^ Rivera Cambas, Manuel (1873). Los Gobernantes de Mexico: Tomo II (in Spanish). J.M. Aguilar Cruz. p. 304.

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