Question

How and why did the ideal of manifest destiny and the outcome of the Mexican-American War lead to U.S. expansion to the Pacific Ocean?

Answer 1

Before , American Civil War (861–65, the idea of Manifest Destiny was used to validate acquisitions in Oregon Country, Texas, New Mexico, and California.

Step-by-step explanation:

this was Manifest Destiny,

the supposed inevitability of continued territorial expansion of boundaries and the United States westward to the Pacific and beyond.