Answer:
Lack of power to enforce taxation
Explanation:
The Articles of Confederation couldn't collect money from the states, they could only ask nicely. When the only state that ended up paying taxes was Virginia, Congress was basically broke. They couldn't pay soldiers and had a hard time keeping up with the war.
Spain. Won. Because they fought four their lives
Farming, especially cotton farming, thanks to eli whitney's cotton gin
Many Americans were exposed to the ideas of the federalists by the "Federalist Papers".