Answer:
the League of Nations
Explanation:
After the World War I ended, the League of Nations was formed. Lot of nations became members of it, but not the United States. The United States felt that joining the League of Nations was not in its best interest, especially considering the fact that they wanted to further expand in the Pacific, nor were they willing to give up on the territories they recently gained and controlled. This changed after the World War II though, when the League of Nations became the United Nations, and the United States had different interests and were one of the first nations to join in.
Agriculture plays a crucial role in the rise and development of civilizations, since it allows for there to be a "food surplus"--meaning that people other than farmers can spend time and effort developing new skills and practicing new trades.
It is the last one they both served in the Mexican-American war
The main reason the Spanish wanted to colonize the Americas was to extract as many riches (primarily gold and silver) from the area as possible, since they would bring things back to Spain in order to enrich their empire.