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Thornton Affair



 
 
The Thornton Affair, also known as the Thornton Skirmish, was an incident between the military forces of the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and Mexico
Mexico

The United Mexican States , commonly known as Mexico , is a federalism constitutionalism 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 Mexico....
. It served as the primary justification for U.S. President James K. Polk
James K. Polk

James Knox Polk was the List of Presidents of the United States President of the United States, serving from March 4, 1845 to March 4, 1849. He was 49 years old at the time of his inauguration, making him the youngest President up to that time....
's declaration of war
Declaration of war

A declaration of war is a formal performative speech act or signing of a document by an authorised party of a government in order to initiate a state of war between two or more nations....
 against Mexico
Mexico

The United Mexican States , commonly known as Mexico , is a federalism constitutionalism 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 Mexico....
 in 1846, sparking the Mexican-American War.

The incident is clouded by over a century and a half of propaganda, half truths, and great exaggerations by the participants on both sides.






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The Thornton Affair, also known as the Thornton Skirmish, was an incident between the military forces of the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and Mexico
Mexico

The United Mexican States , commonly known as Mexico , is a federalism constitutionalism 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 Mexico....
. It served as the primary justification for U.S. President James K. Polk
James K. Polk

James Knox Polk was the List of Presidents of the United States President of the United States, serving from March 4, 1845 to March 4, 1849. He was 49 years old at the time of his inauguration, making him the youngest President up to that time....
's declaration of war
Declaration of war

A declaration of war is a formal performative speech act or signing of a document by an authorised party of a government in order to initiate a state of war between two or more nations....
 against Mexico
Mexico

The United Mexican States , commonly known as Mexico , is a federalism constitutionalism 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 Mexico....
 in 1846, sparking the Mexican-American War.

The incident is clouded by over a century and a half of propaganda, half truths, and great exaggerations by the participants on both sides. However, it can be ascertained that the event occurred sometime around dusk on April 25, 1846, and continued into the early hours of April 26.

Background

Before and throughout the Mexican-American war, the state of Texas
Texas

Texas is a U.S. state located in the South Central United States, nicknamed the Lone Star State. Texas is the second largest U.S. state in both area and population, spanning , and with a growing population of 24.3 million residents....
 (and previously the Republic of Texas
Republic of Texas

The Republic of Texas was a sovereignty nation in North America between the United States and Mexico that existed from 1836 to 1846.Formed as a break-away republic from Mexico by the Texas Revolution, the nation claimed borders that encompassed an area that included all of the present U.S....
) was considered by Mexico to be a rebelling Mexican province.

A condition of the Adams-Onis Treaty
Adams-Onís Treaty

The Adams-On?s Treaty of 1819, also known as the Transcontinental Treaty of 1819, settled a border dispute in North America between the United States and Spain....
 of 1819 between Spain
Spain

Spain or the Kingdom of Spain , is a country located in Southern Europe on the Iberian Peninsula.The Spanish constitution does not establish any official denomination of the country, even though Espa?a , Estado espa?ol and Naci?n espa?ola are used interchangeably....
 and the United States was that the U.S. relinquished any claims to Texas. Independent Mexico inherited Spain's prior agreement.

But Mexico's military defeat in the Texas revolution
Texas Revolution

The Texas Revolution or Texas War of Independence was fought from October 2, 1835 to April 21, 1836 between Mexico and the Mexican Texas portion of the Mexican state Coahuila y Tejas....
 had complicated matters. Mexican President Antonio Lopez de Santa Anna
Antonio López de Santa Anna

Antonio de Padua Mar?a Severino L?pez de Santa Anna y P?rez de Lebr?n , often known as Santa Anna or L?pez de Santa Anna, was a Mexico political leader who greatly influenced early Mexican and Spanish politics and government, first fighting against the Mexican War of Independence from Spain, and then supporting it, rising to the...
 had been defeated and captured, and he had agreed to the Rio Grande border in the Treaties of Velasco
Treaties of Velasco

The Treaties of Velasco were two documents signed at Velasco, Texas, on May 14, 1836 between Antonio L?pez de Santa Anna of Mexico and the Republic of Texas, in the aftermath of the Battle of San Jacinto ....
. However, the Mexican Congress maintained Santa Anna had no authority to enter into such a treaty. Mexico officially rejected it as invalid and continued to assert a claim over Texas.

The United States regarded the Treaties of Velasco as valid and maintained that even if they were not ratified by the Mexican Congress, a state of war continued to exist between the Republic of Texas and Mexico, a war both Texas and Mexico continued to wage after the Battle of San Jacinto
Battle of San Jacinto

The Battle of San Jacinto, fought on April 21, 1836, in present-day Harris County, Texas, was the decisive battle of the Texas Revolution. Led by General Sam Houston, the Texas Army engaged and defeated General Antonio L?pez de Santa Anna's Mexico forces in a fight that lasted just eighteen minutes....
 and prior to annexation of Texas by the United States. By October 1845, 4000 troops, nearly half the U.S. Army, under orders of President Polk, were positioned on the north side of the Rio Grande
Rio Grande

For the railroad often known as the Rio Grande, see Denver and Rio Grande Western Railroad.The Rio Grande River in the United States, known as the R?o Bravo in Mexico, is a river, long, is the fourth longest river system in the United States and serves as a natural boundary along the border between the U.S....
.The Mexican garrison of Matamoros under Gen. F. Mejia consisted of the Zapadores (Sappers) Battalion, the 2d Light, 1st & 10th Line Infantry Regiments,the 7th Cavalry Regiment, Villas of the North Aux Cavalry, several Companies of Presidales and the Matamoros National Guards Battalion. One company of artillery served 20 guns. Two-three days after the arrival of the Americans, Mexican reinforcements ( 6th Line Infantry Regiment, Tampico National Guards Battalion & Tampico Marine Company)arrived, resulting in a total of 3,000 men. On the 11th & 14th April, Gen. br. P. Ampudia arrived with more reinforcements ( 2,200 men: Mexico Light and 8th Line Cavalry Regiments, 4th Line Infantry, Mexico, Puebla & Morelia Activo Battalions and 6 guns)

Battle

A company of about 70 U.S. Dragoons commanded by Captain Seth Thornton was ordered to scout an area twenty miles (30 km) northwest of what later became Brownsville, Texas
Brownsville, Texas

Brownsville is a city in and the county seat of Cameron County, Texas, Texas, United States. Brownsville is the 15th largest city in the state of Texas and the 130th largest in the United States....
. On April 25, the Dragoons, acting on the advice of a local guide, investigated an abandoned hacienda
Hacienda

Hacienda is a Spanish language word for an estate, usually, but not always, a vast ranch. Some haciendas were plantations, mines, or even factories....
. Two thousand Mexican soldiers under the command of Colonel Anastasio Torrejón were encamped in and around the hacienda, and fighting broke out. Both sides fought ferociously, but the greatly outnumbered U.S. unit was forced to surrender after several hours of resisting.

Aftermath

In the fierce encounter, 16 U.S. Dragoons were killed and 5 wounded (including Captain Thornton). Mexican casualties are unknown. Thornton and 49 of his men were taken prisoner and held at Matamoros, Tamaulipas
Matamoros, Tamaulipas

Matamoros, formally Heroica Matamoros, is a city in the northeast of the States of Mexico of Tamaulipas. It is located at , across the Rio Grande from the U.S....
. Upon learning of the incident, President Polk asked for a declaration of war before a joint session of the United States Congress
United States Congress

The United States Congress is the Bicameralism legislature of the Federal government of the United States of the United States of America, consisting of two houses, the United States Senate and the United States House of Representatives....
, and summed up his justification for war by famously stating:

"The cup of forbearance had been exhausted even before the recent information from the frontier of the Del Norte [Rio Grande]. But now, after reiterated menaces, Mexico has passed the boundary of the United States, has invaded our territory and shed American blood upon the American soil. She has proclaimed that hostilities have commenced, and that the two nations are now at war.".


On May 13, 1846, Congress declared war on Mexico, despite the Mexican government's position that Thornton had crossed the border into Mexican Texas, which Mexico maintained began south of the Nueces River
Nueces River

The Nueces River is a river in the U.S. state of Texas, approximately long. It drains a region in central and southern Texas southeastward into the Gulf of Mexico....
(the historical border of the province of Texas). Opposition also existed in the United States, with one senator declaring that the affair had been "as much an act of aggression on our part as is a man's pointing a pistol at another's breast". The ensuing Mexican-American War was waged from 1846-1848 with the loss of many thousands of lives and the loss to Mexico of all of its northern provinces. The Treaty of Guadalupe Hidalgo
Treaty of Guadalupe Hidalgo

The Treaty of Guadalupe Hidalgo is the peace treaty, largely dictated by the United States to the Ad interim government of a Military occupation Mexico, that ended the Mexican-American War ....
 which ended the war established the Rio Grande
Rio Grande

For the railroad often known as the Rio Grande, see Denver and Rio Grande Western Railroad.The Rio Grande River in the United States, known as the R?o Bravo in Mexico, is a river, long, is the fourth longest river system in the United States and serves as a natural boundary along the border between the U.S....
 as the border between Texas and Mexico, and led to Mexico recognising Texas as a part of the United States.

See also

  • Battles of the Mexican-American War
    Battles of the Mexican-American War

    The battles of the Mexican-American War include all major engagements and most reported skirmishes, including the Battle of Palo Alto, and the Battle of Resaca de la Palma, which took place prior to the official start of hostilities....


Footnotes


External links