In Mexican history, a was a declaration of principles announced in conjunction with a rebellion, usually armed, against the central government of the country (or, in the case of a regional rebellion, against the state government). Mexican were often more formal than the that were their equivalent elsewhere in Spanish America and Spain. Some were as detailed as the United States Declaration of Independence. Some simply announced that the current government was null and void and that the signer of the was the new president.
A total of more than one hundred were declared. One compendium, , compiled by Román Iglesias González (Mexico City: UNAM, 1998), contains the full texts of 105 . About a dozen of these are widely considered to be of great importance in discussions of Mexican history.