Question

briefly explain one diplomatic action that added territory to the united states in the period 1840 to 1855

Answer 1

The Gadsden Purchase, a diplomatic action, added territory to the United States between 1840 and 1855.

Step-by-step explanation:

One diplomatic action that added territory to the United States in the period 1840 to 1855 was the Gadsden Purchase. The Gadsden Purchase was a treaty signed between the United States and Mexico in 1854, during the presidency of Franklin Pierce. It resulted in the acquisition of a strip of land in present-day Arizona and New Mexico, which was purchased for $10 million. This territory was obtained to facilitate the construction of a southern transcontinental railroad route and secure U.S. interests in the region.

Answer 2

The Treaty of Guadalupe Hidalgo, which ended the Mexican-American War in 1848, added an additional 525,000 square miles of U.S. territory, including all or parts of what is now California, Arizona, Colorado, New Mexico, Nevada, Utah and Wyoming.