---
title: "Gulf of Tonkin Resolution Definition | Model Diplomat"
description: "The Gulf of Tonkin Resolution was a 1964 U.S. law allowing military force in Southeast Asia, pivotal for Model UN students and policy researchers."
url: "https://modeldiplomat.com/learn/glossary/gulf-of-tonkin-resolution"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Gulf of Tonkin Resolution was a 1964 U.
- S.
- Why was the Gulf of Tonkin Resolution constitutionally controversial?
- What later cast doubt on the resolution's factual basis?
- What legislation followed from the resolution's legacy?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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## Timeline

1. 7 August 1964

   The Gulf of Tonkin Resolution, formally the Southeast Asia Resolution (Public Law 88-408), was a joint resolution of the United States Congress passed on .

2. 2 August 1964

   It was enacted in response to reported attacks by North Vietnamese torpedo boats on the destroyer USS Maddox on , and a disputed second incident on 4 August…

3. 4 August 1964

   It was enacted in response to reported attacks by North Vietnamese torpedo boats on the destroyer USS Maddox on 2 August 1964, and a disputed second incident…

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Example

In August 1964, President Lyndon Johnson used the Gulf of Tonkin Resolution, passed 88–2 in the Senate, to authorize escalating U.S. military operations against North Vietnam without a formal declaration of war.

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