Guam was captured, and is still controlled today, by America.
Guam . During the Spanish -- American War , the United States captured Guam on June 21 , 1898 . Guam is among the seventeen Non-Self-Governing Territories of the United Nations . On December 7 , 1941 , hours after the attack on Pearl Harbor , Guam was captured by the Japanese , who occupied the island for thirty months . Tryon County was a county in the colonial Province of New York in the British American colonies .