Before Lewis met up with Clark, he began the expedition on August 30, 1803 in Pittsburgh PA. Lt. William Clark would offer to join Lewis on the expedition weeks later on October 13, 1803 at Camp Dubois (in present-day Indiana).
In spring 1805, they continued to the headwaters of the Missouri River, struggled across the Continental Divide, and headed west along the Salmon, Snake, and Columbia Rivers to the Pacific. The expedition then ended on September 23, 1806 upon their return to St. Louis from Oregon. So the expedition took about 3 years.
President Thomas Jefferson
The Louisiana Territory, which comprised much of the central and midwestern United States, from Louisiana in the south up to the dakotas in the north.
Lewis and Clark explored the Louisiana Territory.
William Clark along with Meriwether Lewis formed the famous explorers Lewis and Clark. They went on a three year expedition to explore the Louisiana Territory. They were also tasked with claiming the Oregon Territory for the United States.
Meriwether Lewis
Lewis and Clark were sent to the Louisiana Territory to explore new land.
They explored the Louisiana Territory.
to explore the Louisiana Territory
to explore the vast Louisiana Territory
Merriweather Lewis and William clark
They explored the Louisiana Territory
to explore and find out what was in the Louisiana territory
"When Lewis and Clark set out" is the adverb clause in the sentence. It provides information about the timing or circumstances of the action "they were supposed to explore the Louisiana Territory."
Lewis and Clark
President Jefferson needed Lewis and Clark to map the Louisiana Territory and to explore it.
Meriwether Lewis and William Clark, and Zebulon Pike
To go and explore the Louisiana territory.