1. Western expansion was a significant undertaking. How did Americans conceptualize the region of the Trans Mississippi West in order to justify settling the region

Westward expansion began in the 1800s when American decided to move to the West and settle there.

Explanation:

Westward expansion began with the Louisiana Purchase, the manifest destiny, the Oregon Trail, and the Gold Rush. The Americans decided to move to the West for several reasons, including the growing population in the East. The idea of moving to the West sound appealing with vast grasslands.

Availability of fertile land at a low price was a huge motivation factor for Americans settlers to move West. Several of the trails settlers took to find land to make a profit through farming and cattle.

The railroad played a crucial role in bringing more settlers in the region. Transportation before was limited through wagons. The train provided a cheap way to transport goods and people from one place to another.