Question

What boundaries of the U.S. mainland were formed from the 1840s to 1853

Answer 1

1840- Fiji Islands. - July. Naval forces landed to punish native for attacking American exploring and surveying parties.

Answer 2

Answer:

The US mainland boundary to Mexico from 1848-1853: Texas, New Mexico, Arizona, Utah and California.

Explanation:

Territorial Evolution in US  mainland Border States.

1846 - Texas was annexed by the Federal Government after a Local Referendum, and approved by the US Congress.

1846- The Northwest part of California starts to be American Territory.

1848 - The Guadalupe Hidalgo Treaty formalized the cession over territories such as (the greater part of California), (Northern part of ) New Mexico. Colorado, Utah, Nevada, and Arizona. By the end of the Mexican American War.

1853- The Gadsden Purchase was the final act to buy the southern part of New Mexico.