Manifest Destiny: Manifest Destiny was a belief prevalent during this period that it was America's fate or destiny to expand its territory from the Atlantic Ocean to the Pacific Ocean. It influenced policies and actions related to western territories.
Homestead Act: The Homestead Act was a law passed in 1862 that provided free land in the western territories to settlers who were willing to develop and improve it. This act encouraged westward migration and settlement.
Transcontinental Railroad: The Transcontinental Railroad was a railway line that connected the eastern and western coasts of the United States, facilitating transportation, trade, and settlement in the western territories. It played an essential role in their development.