Title: 
Headings: 

Content: Many people believed that the U.S. was destined to secure territory from "sea to sea," from the Atlantic to the Pacific Ocean. This rationale drove the acquisition of territory. Mexican Cession
historical name for the region of the present day southwestern United States that was ceded to the U.S. by Mexico in 1848 under the Treaty of Guadalupe Hidalgo following the Mexican-American War. this massive land grab was significant because the question of extending slavery into newly acquired territories had become the leading national political issue. Treaty of Guadalupe Hidalgo
February 2 1848. The agreement between President Polk and the new Mexican government for Mexico to cede California and New Mexico to the US and acknowledge the Rio Grand as the boundary of Texas. In return, the US promised to assume any financial claims its new citizens had against Mexico and to pay the Mexicans $15 million. James K. Polk
president in March 1845. wanted to settle oregon boundary dispute with britain. wanted to aquire California.