Respuesta :

President Thomas Jefferson commissioned the expedition shortly after theLouisiana Purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an American presence in this territory before Britain and other European powers

Answer:

President Jefferson wanted the Louisiana territory explored because he wanted friendly contract with the native Americans that wanted to trade goods or to find the northwest passage or to find out what the United States had bought  

Explanation:  

Hope this helps!!!  

Please mark as brainliest:)