War with Mexico Objective: Students will learn the causes that led to the war with Mexico
Causes of the War with Mexico Two causes to the War with Mexico Manifest Destiny Texas Revolution/Annexation of Texas: border issues
Manifest Destiny Polk believed that the United States had a “Manifest Destiny” to reach from the Atlantic Ocean to the shores of the Pacific. Polk made offers to the Mexican Government to buy California, parts of New Mexico, and to settle disputed territory in Texas.
President James K. Polk
Border Dispute The U.S. and Mexico had a different opinion on where the border between Texas and Mexico
Causes of the war with Mexico 2. Texas Revolution/Annexation: border issues Texas, and now the United States, claimed the border at the Rio Grande River. Mexico claimed territory as far north as the Nueces River.
War of Aggression President Polk sent General Taylor to the area that the U.S. considered it’s border. Predictably, Taylor’s troops were attacked by the Mexican army. Polk had what he wanted, a war with Mexico.
General Zachary Taylor
Polk’s message to Congress “...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...I invoke the prompt action of Congress to recognize the existence of the war, and to place it at the disposal of the Executive the means of prosecuting the war with vigor...”
Bear Flag republic Americans captured the town of Sonoma and proclaimed it independent Republic of California They called the new country Bear Flag Republic John C. Fremont declared he would seize California This outraged Californios
U.S. army goes all the way to Mexico City The U.S army went all the way to Mexico City. Once this happened, Mexico had no choice but to surrender.
Treaty of Guadalupe Hidalgo was signed ending the war.
Mexican cession Gave up all claims to Texas Agreed the Rio Grande as the border between Texas and Mexico Mexico ceded, gave up California and New Mexico U.S gave Mexico 15 million
Gadsden Purchase 1853 agreement to buy a strip of land in what is now the southern United States so that a railroad line could be built to the Gulf of California. It cost $10 million.
Territorial Expansion
Slavery One major problem faced the United States after the war with Mexico. Would slavery be allowed in the new territories? This would be a question that would have to be answered. As you may imagine, there would be a great deal of conflict over this issue.