Answer:
It was a mixture of greed and need.
Explanation:
The Americans believed that the expansion was a command from God to them and for that reason, they already had projects to expand in the most varied possible ways. However, there was a need to find more fertile and arable land where they could establish more productive agriculture, which would give the nation more profits. Agriculture in this case became a necessity and a form of ambition, since it could generate a lot of profit.
Only a few European nations agreed to join the league.
