1. Niether France of the U.S. knew the exact size or boundries of the Louisiana Territory.
2. Meriweather Lewis and William Clark led 45 explorers on the journey, left St. Louis May 1804
A. Were instruced to record all observations "with great care and accuracy"
B. Were aided by American Indians particularly the Mandan and Shoshone
C. After first winter hired a Canadian Fur Trader and his Shoshone wife, Sacagawea, proved invaluable to expedition
a. Showed expedition best places to fish, hunt and find wild vegatable, also helped in negotiations with natives.
D. Expedition travelled up the Missouri River crossed the Rocky Mountains and canoed down the Snake and Columbia
Rivers to the Pacific Ocean.
E. Returned after two and a half years with plants, animal specimens , animal bones and pelts ans various soil
and mineral samples.