Question

By 1821, what three countries shared territory in what is today the western United States of America?

Those territories are American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the United States Virgin Islands.

Answer 1

Following the war, many islands were entrusted to the U.S. by the United Nations, and while the Northern Mariana Islands remain a U.S. territory, the Marshall Islands, Federated States of Micronesia, and Palau emerged from the trust territory as independent nations.

Step-by-step explanation:

:p hope this helps