Some territories acquired at least partially as a result of war were.

1. The thirteen (13) colonies from the Revolutionary War stretching to the Eastern shore of the Mississippi and north to the great lakes
2. American Samoa was acquired under the 1899 Treaty of Berlin between Germany, Great Britain, and the United States .
3. The Federated States of Micronesia were part of the Trust Territory of the Pacific Islands . (now independent)
4. Guam became a territory of the United States after the Spanish-American War. Under the December 10, 1898 Treaty of Paris, Spain ceded the island to the United States .
5. The Northern Mariana Islands were part of the Trust Territory of the Pacific Islands .
6. The Republic of the Marshall Islands was part of the Trust Territory of the Pacific Islands . (now independent)
7. The Republic of Palau was part of the Trust Territory of the Pacific Islands . (now independent)
8. The Philippines became a territory of the United States after the Spanish-American War. (Given independence after W W II )
9. Puerto Rico became a territory of the United States after the Spanish-American War .
10. Cuba became a territory of the United States after the Spanish-American War . (Soon granted independence)
11. New Mexico is a US Territory after the Treaty of Guadalupe Hidalgo .
12. California is a US Territory after the Treaty of Guadalupe Hidalgo .
13. Arizona is a US Territory after the Treaty of Guadalupe Hidalgo .
14. Florida was acquired by cash payment after a US army was sent to its borders and military action was threatened by implication if not actuality..