USA HISTORY

Detailed explanation-1: -In 1804, Meriwether Lewis and William Clark set out on a two-year journey to document the newly purchased Louisiana Territory. On the way to the Pacific, they collected information on plants, animals, and about some of the Native American nations living in the area.

Detailed explanation-2: -Westward expansion began in earnest in 1803. Thomas Jefferson negotiated a treaty with France in which the United States paid France $15 million for the Louisiana Territory – 828, 000 square miles of land west of the Mississippi River – effectively doubling the size of the young nation.

Detailed explanation-3: -Manifest Destiny, in U.S. history, the supposed inevitability of the continued territorial expansion of the boundaries of the United States westward to the Pacific and beyond.

Detailed explanation-4: -It’s widely accepted that the first settlers were hunter-gatherers that came to North America from the North Asia Mammoth steppe via the Bering land bridge.