The Domino Theory, a strategic principle that shaped United States foreign policy during the Cold War era, continues to be a subject of intense historical scrutiny and debate.

This theory, which posited that the fall of one country to communism would trigger a successive collapse of neighboring states, had a profound impact on shaping American involvement in the Vietnam War and influenced global politics throughout the latter half of the 20th century.

As the United States sought to contain the spread of communism in the aftermath of World War II, the Domino Theory became a cornerstone of its foreign policy.

Policymakers in Washington, D.C. - https://vietnamfocusguide.com/blog/domino-theory-us-involvement-vietnam/?unique_id_z9xxolpv

"The Domino Theory: How It Shaped U.S. Involvement in Vietnam and Global Politics During the Cold Wa