Columbia International Affairs Online: Policy Briefs

CIAO DATE: 03/2012

How Verbal Threats to Close Oil Transit Chokepoints Lead to Military Conflict

John Bowlus

January 2012

Global Political Trends Center

Abstract

On December 26, 2011, in response to US, European, and potential Asian sanctions on Iranian oil exports, the government in Tehran issued a threat to “cut off the Strait of Hormuz.” The US Defense Department responded that any blockade of the strait would be met with force. On first read, it is easy to dismiss such saber rattling as another chapter in the new Cold War in the Middle East between Iran and its allies – including Syria, Hamas, and Hezbollah – and the US, Israel, and the Sunni Gulf States, mostly notably Saudi Arabia. Iran has since backed away from its threat, but the event still carries importance because it is unclear how both the US and Iran will continue to respond, particularly as the diplomatic and economic pressures grow more acute while Iran’s controversial nuclear program advances. Could such a verbal threat by Iran to cut off the Strait of Hormuz ignite a military conflagration in the region? The relationship between military conflict and oil supply disruptions is well established; however, policymakers and analysts tend to focus on the incidents in which military conflict causes disruptions in oil supplies and sharp increases in prices. The first and most obvious example of this dynamic was the Arab-Israeli War of 1973. The subsequent oil embargo by the Arab members of the Organization for Petroleum Exporting Countries (OPEC) against the United States and the Netherlands for their support of Israel caused prices to soar as oil-consuming nations endured supply shortages. The Iranian Revolution from 1978 to 1979 was another event that curtailed Western nations’ access to oil and caused prices to spike. When thinking about the relationship between military conflict and oil supply disruptions, however, policymakers and analysts should also recognize that the competition over oil – and even verbal threats to disrupt oil supplies by closing oil transit chokepoints – have either led directly to military conflict or have provided a useful cover under which countries have initiated military conflict. By examining past episodes when countries issued threats to close oil transit chokepoints, this Policy Brief helps illuminate the dangers associated with the current crisis over the Strait of Hormuz.