What did the domino theory state?

The Domino Theory was coined by the United States during the Cold War. It stated that if one nation fell to communism, the surrounding nations would follow and so on and so forth. For example, if Vietnam fell to communism, Laos, Cambodia, and others would follow suit. (Laos is a socialist country and Cambodia is democratic, now.) We thought that if we could help developing nations build a democratic government, they wouldn't be a threat to us.

Explanation:

general allotment act (dawes act) february 8, 1887

amendment to the dawes act, february 28, 1891

commission to the five civilized tribes (dawes commission), march 3, 1893