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Americans believed the Rio Grande was the border between Mexico and Texas; Mexicans believed it was the Rio Nueces. This lack of definition resulted in the Thornton Affair, where American blood was shed on this no man's land, and was used as a pretext by Polk to start the war.

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How did the US annexation of Texas lead to the Mexican American War?

The border conflicts between Texas and Mexico were now Intenational Border conflicts between the US and Mexico.


What were the causes of the War With Mexico 1845?

The Annexation of Texas. Texas border conflicts. Mexico was virtually bankrupt. Mexico would not negotiate the sale of Alta California and Nuevo Mexico.


What country fought its U.S. annexation after the war?

Mexico fought the U.S. annexation of Texas after the Mexican-American War, which took place from 1846 to 1848. Following the war, the Treaty of Guadalupe Hidalgo resulted in Mexico ceding a large portion of its territory to the United States, including Texas. However, this annexation was controversial and led to ongoing tensions between the two nations, as Mexico never recognized the legitimacy of the annexation. The dispute contributed to long-lasting diplomatic and territorial issues between the U.S. and Mexico.


What did Mexico consider the US annexation of Texas?

A provocation to start a war, as Mexico had already warned the US that annexation would mean war (it did; and Mexico lost).


Explain the two main causes of the US's war with Mexico?

Mexico informed the US that the annexation of Texas would be considered an act of War, but the US annexed it anyway. Mexico did not declare war but it severed the diplomatic ties with the US.President Polk ordered General Zachary Taylor to proceed with his Army to the Rio Grande River and prepare to defend Texas from invasion. Both Armies were in the contested Nueces strip, met, shots were fired and men died. The US Congress declared war.

Related Questions

How did the US annexation of Texas lead to the Mexican American War?

The border conflicts between Texas and Mexico were now Intenational Border conflicts between the US and Mexico.


What are the steps that led to war with Mexico?

The annexation of Texas by the US. Border Conflicts. Failed negotiations to purchase Alta California an Nuevo Mexico.


What were the causes of the War With Mexico 1845?

The Annexation of Texas. Texas border conflicts. Mexico was virtually bankrupt. Mexico would not negotiate the sale of Alta California and Nuevo Mexico.


Why did the Mexican-America war occur?

Border conflicts between Texas and Mexico and the refusal by Mexico to consider the sale of Alta California and Nuevo Mexico.


Mexico and America clashed over what?

Texas (more specifically, the annexation of Texas into the Union).


Who did the United States acquire the Texas annexation from in 1845?

it was a result of a war between Spain and America


What border dispute the war with Mexico?

After the Texas Annexation (when America admitted Texas into the Union as the 28th state), America claimed that Mexico was trespassing onto American soil. America claimed that the border between Mexico and The United States was the Rio Grande River. However, Mexico said it was the Nueces River. Many people believe that America claimed that the border was the Rio Grande River so they could easily acquire more land from Mexico.


What are two differences between Mexico and South America?

That Mexico is Mexico and south america is south america


What did Mexico consider the US annexation of Texas?

A provocation to start a war, as Mexico had already warned the US that annexation would mean war (it did; and Mexico lost).


What led up to the Mexican War?

The annexation of Texas and border conflicts coupled with the US desire ti buy Alta California and Nuevo Mexico in pursuit of Manifest Destiny.


How did the annexation of Texas benefit the US?

Mexico had warned the United States that the annexation of Texas would be considered an act of War by Mexico. The US Annexed and Mexico failed to declare War, but it did reinforce the troop strength on its border and broke diplomatic relations with the United States.


What cause tension between Mexico and the US?

The Texas Annexation, which made Texas the 28th state of the United States.