Which Territory: - Texas was previously a state within the country of Mexico - After a while they fought their own war for independence (with weapons and money provided by the U.S.) against Mexico - After winning this war for independence, Texas was its own country for 9 years, all the while asking the U.S. to acquire/add them - This sparked a great debate in the U.S. about the potential expansion of slavery (Texas was a slave-supporting state at the time), representation of slave states in Congress, and reinvigorated the abolition movement within the country because some states were slave-free and others still supported slavery - Ultimately, Texas was added to the U.S. as the 28th state, and Iowa was added as a free state the following year - This angered Mexico because it still considered Texas its territory, eventually leading to the Mexican-American War Options: Texas Annexation, The Oregon Territory, The Mexican Cession, Gadsden Purchase