問題です！！メキシコ戦争チカーノ

質問

1.Why was war profitable for U.S. during America's westward expansionism into the territories of American Southwest?
2.Who were the combatants during 1830's-1840's conflicts?
3.Why did U.S. declare war on Mexico? What did these lands produce?

回答No.1

SPS700

ご参考までに
　　　　http://ja.wikipedia.org/wiki/%E7%B1%B3%E5%A2%A8%E6%88%A6%E4%BA%89

補足

１番と２番がわからないんですよね。
なにか少しでもわかるのらな教えてください！