• In January, Jefferson is granted money for expedition and appoints Lewis to lead the group.

• Lewis invites Clark to join him and they set up Camp Wood on banks of Mississippi River.

• Expedition sets off on May 14th.

• Reaches Great Plains and almost immediately begins recording animals previously unseen.

• Lewis and Clark hire Toussaint Charbonneau as interpreter.

• First meet Sacagawea.

• Sacagawea gives birth to baby boy. Helps lead expedition through familiar landmarks.

• Mount Hood sighted, proof that at last they are nearing the ocean.

• Expedition crosses the Continental Divide and reaches Pacific Ocean.

• Leave for home in March and reach Yellowstone by July.

• Lewis & Clark part company before rejoining to finish the expedition.

• Reach St. Louis on September 23rd.