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Meriwether Lewis &William Clark
Expedition Leader
Army Captain / naturalist
studied medicine, botany,
zoology, and navigation.
2nd in Command
Ex-Army officer/ mapmaker
geographer and nature artist
Excelled at hunting, fishing,
trapping, tracking, camping,
river and land navigation.
Goals of the Expedition
1. Scientific – Study plants, animals, geography
2. Mapmaking – chart the new American lands
3. Economic – What new resources will help
America?
4. Geographical – Source of the Missouri River? Is
there a river passage to Pacific?
5. Ambassadors to Indian Tribes – Bring messages
of friendship – “Peace Medals”
JEFFERSON PEACE MEDAL
The Corps of Discovery• Along with Lewis and Clark
went:
– Twenty-one soldiers,
– eighteen river men,
– an interpreter,
– Clark’s slave York
– Newfoundland dog
• Winter of 1803-1804
– camp was established at
Camp Wood, near St.
Louis Missouri.
– Training and final
preparations were made
for the departure in May.
On May 14, 1804, the Expedition
starts up the Missouri River with
three boats and 43 men
The Corps of Discovery
headed upstream along
the Missouri River.
Because they were
traveling against the
current, the men had to
pole, row or drag the
boats with ropes while
on the riverbank.
Headed Upstream:
A Grueling Start
Spring 1804Lewis and Clark met many Indian tribes along the way including the
famous Lakota, or Teton Indians in central South Dakota
• Lewis and Clark spend the
winter of 1804 in a
Mandan Indian village in
what is now North Dakota
• They hire a French trapper
to be their guide through
the Indian lands
• Sacagawea, the guide’s
wife and a Shoshone
Indian woman from the
Rockies joins the
expedition
WINTER 1804 /1805
Sacagawea and her infant son Pompey
Accompany Lewis and Clark on
their journey through the Rockies and
to the Pacific
Sacagawea
12 men packed the keelboat and a
canoe with specimens, maps
and notes for President Jefferson,
and headed back home in April to
deliver these important discoveries.
The remaining crew continued west
upriver on the Missouri in two
pirogues and six dugout canoes.
Spring 1805: Some go back,
the rest go onward to the Pacific
• The Corps meets with the SHOSONE
Indians , who are familiar with the
Rockies
• Sacagawea is reunited with her brother,
the Chief of the tribe
• The explorers buy horses and the
expedition takes 11 days to cross the
Rocky Mountains
Summer 1805: Shoshone Indians, Rocky
Mountains, and the Continental Divide
Once they cross the Rockies,
Lewis and Clark meet the Nez
Perce Indians who teach the
explorers how to make Canoes
from logs that will speed down
the Snake and Columbia Rivers
toward the Pacific Ocean
Fall 1805: The Home Stretch
Dugout
Canoes
November 1805: The Pacific Ocean!
The expedition emerges
on the bluffs of modern
day Oregon and
completes the most
impressive journey of all
time
Spring and Summer 1806:
The Journey Home
• The expedition begins a 6
month journey back to St.
Louis from the Oregon
Territory
•Lewis and Clark split up and
explore the Missouri and
Yellowstone Rivers
•In July, they meet a few
hostile Indians and kill two –
the only loss of life inflicted
by the expedition
•They reunite and return to St.
Louis as Heroes in September
of 1806
Strategic National Outcomes
1. Sets the stage for westward expansion and future western settlement
2. Sets the stage for Future Military presence in the west
3. Expands American trade in furs and lumber
4. Contact made with many unknown Indian Tribes Trade networks and Future Allies
Science and Nature
Outcomes
Accurate Maps
Plants
Animals