The United States gained Cuba, Guam, the Philippines, and Puerto Rico.
Equality for all people is important in a democracy because society functions better as a whole. If there were the rich people who were treated good and lower-class people who were not treated as fair as the others a lot of divisions would be created within the society. Divisions are not good for a proper functioning democratic government.
becuase people don't like change and for all Americans know they could be spys from the counrty that they said they were trying to get out of.
Well of course it happens to be good for our society due to it helping people adjust. Hell yeah :)
The Native Americans resisted by basically doing rebellions. They would raid places and burn down places and etc, until they got what they wanted. Even in some places their efforts were so impactful laws were changed.