Structure of the New Government

When Texas was annexed by the United States in 1845, Texas government had been shaped largely within the Anglo-American tradition. The Constitution of the Republic of Texas (1836) had been replaced by a new one owing to the fact that Texas had been annexed by the United States.

Requirements of Texas Statehood

As early as 1837, the Republic tried many times to ask for annexation with the United States. Texas was finally annexed when James K. Polk won the election of 1844. On December 29, 1845, Congress admitted Texas to the U.S.
After Texas's annexation, Mexico refused to cooperate with the United States. While the United States claimed that Texas's border stretched to the Rio Grande, Mexico claimed it was the Nueces River. While the former Republic of Texas could not enforce its border claims, the United States had the military strength and the political will to do so. President Polk ordered General Zachary Taylor south to the Rio Grande on January 13, 1846. The first battles of the war were fought in Texas: the Siege of Fort Texas, Battle of Palo Alto and Battle of Resaca de la Palma. After these victories, the United States invaded Mexican territory ending the fighting in Texas.

MEXICAN WAR

Causes of the War

There were many causes of the Mexican War. One of the causes was the American annexation of Texas. The Mexican government took the Annexation as a declaration of war.

Another cause was the American claims against Mexico rising from the Mexican revolutions.

The third cause of the war was the Texas War of Independence and the annexation of that area to the United States.




Role of the Texas Rangers

The Texas Rangers had many roles during the Mexican War (1846- 1848), fighting in both the northern and central. The Rangers had plenty of experience and combat intelligence. The Ranger did, in fact, indeed help the Republic of Texas. They were strong and courageous and help The Republic of Texas a more independent Country.

Tejanos in the War

In 1821, at the end of the Mexican War of Independence, there were about 4,000 Tejanos living in what is now the state of Texas.  By 1830, the 30,000 settlers in Texas outnumbered the Tejanos six to one. The Texians and Tejanos alike rebelled against the authority of Mexico City and the measures applied by the Santa Anna. Tensions between the central Mexican government and the settlers eventually led to the Texas Revolution.

Treaty of Guadalupe-Hidalgo

The Treaty of Guadalupe Hidalgo, was a treaty that brought an official end to the Mexican-American War (1846-1848). It was signed on February 2, 1848, at Guadalupe Hidalgo.

Compromise of 1850

Boundary Dispute

Sometime around 1820, Mexico combined Texas with Coahuila. Despite whatever the Mexicans had claimed, the American immigrants who arrived there still thought the southwestern boundary of Texas was the Rio Grande. Many arguements and fights broke out between the Mexicans and the Anglo-Americans. Some Leaders in Texas, such as Stephen F. Austin, began to plan how they were going to solve the imbiggening problem of the Boundary Dispute.



Terms of the Compromise

Here are the terms:

1. Texas gave up most of the western land they claimed and received $10,000,000 to pay off their national debt.
2. The Fugitive Slave Act was passed, saying that all U.S. citizens must assist in the return of runaway slaves.
3. California was admitted as a free state.
4. The slave trade was abolished in the District of Columbia.

The Issues involving the Annexation of Texas

1. A border dispute developed between Texas and Mexico.
2. The resolution did not give Texas the right to secede; therefore the 1861 Civil War secession was illegal.
3. It caused the Mexican War.
4. Texas had to change their whole government.

The Causes and Effects of the Mexican War

Causes

1. Texan Annexation. Mexico had warned it would regard annexation as an act of war. When it took place, Mexico did not declare war, but broke diplomatic relations.
2. The Boundary Dispute. Regardless of its status (was it an American state or a rebellious Mexican province?), the United States maintained that the southern border of Texas was formed by the Rio Grande, but Mexico argued that the traditional boundary was at the Nueces River farther north.
3. Monetary Claims against Mexico. The United States had extracted a promise from the Mexican government to pay $3 million to cover the claims of American citizens who had lost property during turmoil and revolution. Mexico defaulted on those payments and the American creditors pressed their government for action.

Effects



1.The United States got territorial gains on their behalf due to the Treaty of Guadalupe Hidalgo.

2. They got an internal conflict over slavery.

3. The downfall of the Mexican government.

Texas' change in border from 1500 to 1850