Texas Revolution
The Texas Revolution or Texas War of Independence was an armed conflict between Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 and settlers in the Texas
Mexican Texas
Mexican Texas is the name given by Texas history scholars to the period between 1821 and 1836, when Texas was an integral part of Mexico. The period began with Mexico's victory over Spain in its war of independence in 1821. For the first several years of its existence, Mexican Texas operated very...

 portion of the Mexican state Coahuila y Tejas
Coahuila y Tejas
Coahuila y Tejas was one of the constituent states of the newly established United Mexican States under its 1824 Constitution.It had two capitals: first Saltillo, and then Monclova...

. The war lasted from October 2, 1835 to April 21, 1836. However, a war at sea between Mexico and Texas would continue into the 1840s.

Animosity between the Mexican government and the settlers in Texas, including many settlers of Mexican ancestry, began with the Siete Leyes
Siete Leyes
The Siete Leyes were a series of constitutional instruments that fundamentally altered the organizational structure of the young first Mexican republic...

 of 1835, when Mexican President
President of Mexico
The President of the United Mexican States is the head of state and government of Mexico. Under the Constitution, the president is also the Supreme Commander of the Mexican armed forces...

 and General Antonio López de Santa Anna
Antonio López de Santa Anna
Antonio de Padua María Severino López de Santa Anna y Pérez de Lebrón , often known as Santa Anna or López de Santa Anna, known as "the Napoleon of the West," was a Mexican political leader, general, and president who greatly influenced early Mexican and Spanish politics and government...

 abolished the federal Constitution of 1824 and proclaimed the more centralizing
Centralized government
A centralized or centralised government is one in which power or legal authority is exerted or coordinated by a de facto political executive to which federal states, local authorities, and smaller units are considered subject...

 1835 constitution
1835 Constitution of Mexico
Mexico's so-called 1835 Constitution was not a formal, fully fledged constitution, but two documents that amended the 1824 Constitution in a way that substantially changed the character of Mexican government: the Siete Leyes of 1835 and the 1836 Constitution Laws.Delegates met in San Felipe to...

 in its place.