Because the Americans knew that if they entered the war they would need a lot of money, lives would be lost, it was questionable what would happen with the political scene; whether the ruling party would still have the majority vote once it was all over, they would be more susceptible to attack, etc.
There are many factors to consider before deciding on entering a war.
<span>1. In agriculture, a cash crop is a crop which is grown for profit.</span>
The printing press by Guttenberg.
Spanish alliances with other Native American groups proved useful for conquering the Aztecs as the Spanish could now communicate with the Aztecs (Native Americans such as Malinche, a female Indian, picked up Spanish easily and could translate to the Spanish), and they began to learn about local cultures and politics. Some of the these Native American groups also personally hated the Aztecs and gladly fought the Spanish to conquer their empire.