Create new trade agreements
Western farmers counted on on the Mississippi River to transport their wheat, corn and other goods. Spain controlled the New Orleans Port which was extremely important in the transportation of goods. Thomas Pinckney was sent by the US to find a way to keep the port on the river open. US clearly understood the economical significance of the river, hence tried to do their best to gain control over it.
Marshall Plan
The Marshall Plan, also known as the European Recovery Program, was a U.S. program providing aid to Western Europe following the devastation of World War II. It was enacted in 1948 and provided more than $15 billion to help finance rebuilding efforts on the continent.