American planters, who have been cultivating large tracts of land belonging to Mexico's Texas and California for many years, launched a rebellion in 1835 and declared Texas independence in 1836.
1845, the United States incorporated Texas into its territory. In order to occupy other "disputed" territories, 1846, 1 in June, 2006, American troops entered Mexico, south of Texas. The army of the young Mexican Republic is less than 25,000, and it is supplemented by the recruitment system. Cavalry is its attack force. The U.S. military has about 8,000 regular troops as its backbone, supplemented by a large number of volunteers in wartime. 1846 in may, the first large-scale battle started in Paulo alto and Reza Caderas Palma.
1846, 13 in may, that is, four months after the start of military operations, the us government officially declared war on Mexico after the us military occupied a part of Mexican territory between the Novice River and the Rio Grande. The strategic attempt of the interventionists is to launch a surprise attack from north to south, divide Mexican territory and occupy its capital. The task of the US Navy is to block the ports and coastal areas in the Pacific Ocean and the Gulf of Mexico. After several fierce battles, American troops occupied Monterrey.
By the beginning of 1847, it occupied a large area of land in northern Mexico and California. In the battle of Buena Vista on February 22-23, the Mexican army was defeated again. But with the active support of the Indians, they continued to fight behind the intervention army.
1847 On March 27th, after a two-week siege, American troops led by General Scott crushed the resistance of 4,000 defenders in Veracruz Port, and then advanced to Mexico City, the capital. Mexican President Santa Anna hastily assembled 6.5438+0.2 million troops and decided to go to war with the US military in the Rogo area northwest of Veracruz. However, due to poor organization, it was defeated by the US military on April 18. Due to the mutiny of some military leaders and the open resistance of landlords and religious factions who refused to spend some money to finance national defense needs, the combat effectiveness of the Mexican army was greatly weakened, although its morale was not lost. In order to defend the capital, an army of 20,000 men and 65,438+000 guns was assembled.
1847 During August and September, bloody battles were fought in the suburbs and cities of Mexico. Although the American army suffered heavy casualties, it finally captured the Mexican capital on September 15. The Mexican people are determined to continue their struggle,
The ruling class, on the other hand, hastily signed a peace treaty that humiliated the country according to the conditions put forward by the United States. The United States occupied almost half of Mexico. This is most of California, Nevada, Utah, Arizona and New Mexico, as well as parts of Colorado and Wyoming. The Rio Grande is the border between the two countries. To show compensation, the United States paid150,000 dollars to Mexico.
In the US-Mexico War, the United States surpassed Mexico and the United States in military organization, technical equipment and military training. The US military has the initiative and the navy actively supports it, while Mexico actually has no navy. In many battles, the US military won by virtue of its artillery superiority.