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Constitutional government of Texas began with Mexican Federal Constitution of 1824, but resembled more of the 1812. -
Domingo de Ugartechea sent out Francisco de Castañeda and 100 dragoons to get the cannon that Gonzales refused to surrender in the settlement.
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100 dragoons left San Antonio de Béxar carrying an official order. -
In 1836 Texas won independence from Mexico and the United States refrained from annexing it.
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In 1844 the president restarted the negotiations with the Republic of Texas, to culminate a treaty of annexation.
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Before leaving office and with the help with president-elect Polk, Tyler was able to pass a congressional resolution and signed into law.
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On December 29th of 1845 Texas was admitted into the union. -
Mexico claimed the Nueces River as the boundary to the north of the Rio Grande, and considered advance of Taylor's army an act of aggression.
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U.S. Congress voted in favor of the president Polk request to declare war on Mexico the reason was to get Texas. -
The war officially ended with the signing in Mexico of the Treaty of Guadalupe Hidalgo.