2. President Thomas Jefferson made the Louisiana Purchase. – Jefferson went against his own principle of strictly interpreting the Constitution to buy the Louisiana Territory. He bought the land from Napoleon Bonaparte of France – Bonaparte sold the land to Jefferson for 15 million – The Louisiana Territory doubled the size of the United States.

4. The Lewis and Clark Expedition was also called the Corps of Discovery – The expedition was sent out into the Louisiana Territory by President Jefferson to: Find a water route to the Pacific Ocean by following the Missouri River to its source. Establish trade relationships with Native Americans. Exert control over the Native Americans Gain other information (flora and Fauna) the land that had been acquired.

6. Native Americans greatly aided the Corps of Discovery Sacajawea helped in the following ways: – finding edible foods (plants and funguses hunting and fishing) – Translated – Acquired horses and other supplies need by the expedition. – Helped keep the peace.