USA HISTORY

Detailed explanation-1: -After the Louisiana Purchase Treaty was made, Jefferson initiated an exploration of the newly purchased land and the territory beyond the “great rock mountains” in the West. He chose Meriwether Lewis to lead an expedition, who in turn solicited the help of William Clark.

Detailed explanation-2: -Lewis and Clark’s team mapped uncharted land, rivers, and mountains. They brought back journals filled with details about Native American tribes and scientific notes about plants and animals they’d never seen before. They also brought back stories-tales that made other Americans dream about heading west.

Detailed explanation-3: -The expedition did not find an all-water route across the continent, but the maps showed how to reach the Pacific Ocean by a combination of waterways and land routes. Meriwether Lewis identified 178 plants new to science, including bitterroot, prairie sagebrush, Douglas fir, and ponderosa pine, as well as 122 animals.