what was the gadsden purchase going to be used for
The land to the north of the Gila River, in United States territory, was too mountainous. President Pierce instructed the American minister to Mexico, James Gadsden, to purchase as much territory in northern Mexico as possible.he Gadsden Purchase represented the last parcel of land acquired by the United States to complete the 48 mainland states. The transaction with Mexico was controversial and it intensified the simmering conflict over slavery and helped to inflame the regional differences that eventually led to the Civil War.