the answer is 1. The map with the whole country shows the distribution of gold,coal and oil minerals and the other map shows the expansion of the USA, clearly due to the riches found in these areas,as most of them, are located in the West.
2. The US gained the wealth the under the soil, gold, oil and coal, mainly gold and oil.
The United States shouldn't have declared war against Mexico because it was its land and though not fully explored and populated the regionhad also Native American nations, an alternative buy be to buy or get agreements to explore the regions. A second reason is that it is a clearly example of a stronger nation preying on a weaker one, an atittude which many countries do not accept.
Counterargument: It was their right to keep their state and not invade and declare war because of land.
Even though some people think that it was their right to keep the land, one could argue that caudillo-like states, as in South America, could emerge and an elite would totally dominate the poorer on the exploration of the weath.
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