What was the main motivation behind French settlement of the Louisiana Territory? improved relations
spread of Christianity
expansion of slavery
increased trade

expansion of slavery

Explanation:

Napoleon was eager to sell which would turn out to expand slavery in the United state. Louisiana was known as the largest and most lucrative market for slave trade within the Pre-civil war. The Ameriacans were looking at buying Louisiana so they could break down the territorial influence over he french. The French had to let go due to the revolution by the Haiti slaves for freedom.