From the Iran-Iraq War to the Gulf War: How Middle East Conflicts Shook the World Oil Market
By New York Finance Think
September 16, 2026
Introduction
When Americans fill up a car with gasoline, most people do not think about what happens thousands of miles away in the Middle East.
But the history of the oil market shows that a war in the Persian Gulf can eventually affect the price of gasoline, diesel, airline fuel, transportation and many everyday products in the United States.
Two major conflicts are especially important:
These wars did not create every oil-price increase by themselves. But they showed the world how vulnerable global oil supplies could be when major producing countries face war, damaged infrastructure or dangerous shipping routes.
The U.S. Energy Information Administration identifies the Iranian Revolution, the Iran-Iraq War and the 1990-91 Persian Gulf War among major historical oil-price shocks connected to political events and supply disruptions.
Here is the story, step by step.
1. Iran Was a Major Oil Producer
Before the Iranian Revolution, Iran was one of the world’s major oil producers.
Iranian oil production averaged more than 5 million barrels per day between 1972 and 1978, according to the U.S. Energy Information Administration.
Iran’s oil industry was therefore important not only to Iran but also to the international oil market.
That meant any major disruption in Iran could affect the global market.
2. The Iranian Revolution Came First
In the late 1970s, Iran went through the Iranian Revolution.
The political change disrupted oil production and exports.
According to the EIA, Iranian crude oil production fell by an average of about 3.9 million barrels per day from 1978 to 1981 compared with earlier production levels.
This was already a major shock to the world oil market.
In simple words:
Political revolution → oil production falls → global supply becomes tighter → oil prices rise.
3. Then the Iran-Iraq War Started
On September 22, 1980, Iraq launched a major attack against Iran.
The war eventually lasted about eight years.
Both countries had important oil resources.
That made the war especially important for the energy market.
Oil facilities, pipelines, ports and shipping routes became part of the wider security problem.
4. The War Was Not Simply an “Oil War”
It is easy to say that Iran and Iraq fought because of oil.
The real history was more complicated.
The conflict involved:
- Border disputes
- The Shatt al-Arab waterway
- Iraq’s concerns about Iran after the 1979 revolution
- Regional political power
- Saddam Hussein’s ambitions
- Security concerns
- Oil resources and economic interests
Oil was an important part of the conflict, but it was not the only reason for the war.
5. Oil Production Became a Major Problem
The war affected oil production in both countries.
Iran’s oil production had already been damaged by the revolution.
Then the war created another layer of uncertainty.
Oil companies, governments and traders had to ask a simple question:
How much oil can actually reach the world market?
That question became extremely important.
6. The Persian Gulf Became a Dangerous Place
The Persian Gulf is one of the most important oil-producing regions in the world.
Oil from fields in countries such as Iran, Iraq, Kuwait and Saudi Arabia has historically moved through ports and shipping routes in the Gulf.
The oil chain is simple:
Oil field → pipeline → storage/export terminal → tanker → Persian Gulf → Strait of Hormuz → world market
If a war interrupts any major part of that chain, the market can react.
7. The Tanker War Made the Situation Worse
During the Iran-Iraq War, attacks on oil tankers became known as the Tanker War.
The two countries attacked shipping connected to the other side.
This created a new problem.
Even when oil was still underground and production was possible, getting that oil safely to international buyers became more difficult.
That meant:
Oil production risk + shipping risk = greater market uncertainty.
8. Iraq Attacked Iranian Oil Exports
Iraq targeted Iranian oil infrastructure and shipping.
One important target was Kharg Island, a major Iranian oil export terminal.
Iran depended heavily on oil exports to earn foreign currency.
Therefore, attacks on oil facilities and tankers were not only military actions. They also put pressure on the other country’s economy.
9. Iran Also Attacked Shipping
Iran responded with attacks against shipping connected to Iraq and its supporters.
The result was a dangerous environment for commercial vessels.
Tanker operators had to consider:
- Missiles
- Aircraft
- Mines
- Naval attacks
- Insurance costs
- Shipping delays
This increased the cost and risk of moving oil.
10. Oil Prices Responded to the Supply Risk
The market does not need to lose every barrel of oil before prices can rise.
Traders also look at future risk.
If the market believes that a large amount of oil could disappear, prices can rise because buyers become willing to pay more for available supplies.
The EIA explains that oil prices are strongly affected by supply disruptions and the ability of other producers to replace lost production.
11. Saudi Arabia Became Extremely Important
Saudi Arabia had something that many other countries did not have:
Large oil production capacity.
Saudi Arabia could increase or decrease production and therefore had an important role in balancing the market.
The EIA describes Saudi Arabia as a major “swing producer” during this period.
In simple language:
Iran and Iraq had problems → Saudi Arabia had the ability to produce more → the world had another source of oil.
But Saudi Arabia also reduced production at various points during the 1980s as OPEC tried to manage the market.
12. OPEC Became Part of the Story
The oil market was not controlled by the war alone.
OPEC production decisions also mattered.
During the early 1980s, OPEC countries reduced production.
By 1981, OPEC production was about one-fourth lower than in 1978, while oil prices had approximately doubled, according to the EIA.
This is an important lesson:
Oil prices are affected by both war and market decisions.
13. The U.S. Was Watching the Persian Gulf
For the United States, the Persian Gulf was strategically important.
The concern was not simply the price of gasoline.
The larger issue was the security of a region supplying a significant share of global oil.
The United States gradually became more involved in protecting Gulf shipping during the later years of the Iran-Iraq conflict.
14. The Iran-Iraq War Finally Ended
After nearly eight years of fighting, Iran and Iraq accepted a ceasefire under United Nations Security Council Resolution 598.
The ceasefire took effect on August 20, 1988.
The war ended without a simple “oil winner.”
Both countries had suffered enormous human, military and economic losses.
But the oil-security lesson remained:
A war in the Persian Gulf could quickly become a global economic problem.
15. Then Came 1990
Only about two years after the Iran-Iraq War ended, another major crisis hit the region.
On August 2, 1990, Iraq invaded Kuwait.
This was a completely different conflict, but it created another enormous oil shock.
16. Why Kuwait Was So Important
Kuwait was a major oil producer.
Iraq was also a major oil producer.
When Iraq invaded Kuwait, the world suddenly faced the possibility that oil supplies from both countries could be disrupted.
The market reacted immediately.
According to the EIA, nearly all Iraqi and Kuwaiti oil production went offline after the invasion.
The peak combined production loss was about 4.3 million barrels per day.
17. Oil Prices Jumped Quickly
The reaction was fast.
The EIA reports that the world crude oil price rose from about $16 per barrel at the end of July 1990 to more than $28 per barrel by August 24, 1990.
That was a sharp move in less than a month.
The market was worried about one thing:
What if the oil supply problem gets even worse?
18. Saudi Arabia Became Important Again
The Iraqi invasion also created a direct security concern for Saudi Arabia because Iraqi forces had moved into Kuwait.
Saudi Arabia allowed U.S. and coalition forces to deploy on its territory.
At the same time, Saudi oil production became extremely important to global supply.
The market needed alternative barrels to replace some of the missing Iraqi and Kuwaiti production.
19. The United States Built a Coalition
The United States led an international coalition to defend Saudi Arabia and ultimately liberate Kuwait.
The military buildup was known as Operation Desert Shield.
The later liberation campaign became Operation Desert Storm.
The air campaign began in January 1991.
The ground campaign began in February 1991.
Major combat operations ended on February 28, 1991.
20. Iraq Damaged Kuwait’s Oil Infrastructure
As Iraqi forces withdrew from Kuwait, they damaged and sabotaged oil infrastructure.
Hundreds of Kuwait oil wells were set on fire.
The fires produced enormous amounts of smoke.
This became one of the most visible environmental disasters of the war.
21. The Kuwait Oil Fires Were Not Stopped in One Day
Firefighting teams from several countries worked for months.
The problem was extremely difficult because:
- Oil wells were burning under high pressure
- Some areas contained unexploded weapons
- Water was difficult to obtain
- Oil continued to flow from damaged wells
- Firefighters had to work around dangerous equipment
The final Kuwait oil-well fire was extinguished in November 1991.
The process took roughly nine months.
22. The Oil Supply Chain Had Been Tested Again
The two wars demonstrated the same basic weakness.
Oil has to move through a long chain.
Oil field
↓
Production
↓
Pipeline
↓
Storage
↓
Export terminal
↓
Tanker
↓
Persian Gulf
↓
Strait of Hormuz
↓
Refinery
↓
Gasoline, diesel and jet fuel
↓
Consumers
A war can interrupt any part of this chain.
23. Why This Matters to Americans
When crude oil becomes more expensive, the effect does not necessarily stop at the oil company.
Higher crude prices can eventually affect:
- Gasoline
- Diesel
- Trucking
- Airlines
- Shipping
- Plastics
- Chemicals
- Manufacturing
- Food transportation
- Consumer prices
The timing and size of the effect depend on many factors.
But the basic connection is simple:
Higher crude oil costs can increase the cost of moving and producing many things.
24. The Biggest Lesson From the 1980s and 1990s
The biggest lesson was not simply:
“War makes oil expensive.”
The more accurate lesson is:
War can reduce production, damage infrastructure, threaten shipping and create uncertainty about future supplies.
That combination can push oil prices higher.
The EIA identifies both the Iran-Iraq War and the 1990-91 Persian Gulf War among major historical oil-price shocks.
25. Iran-Iraq War vs. Gulf War
| Issue | Iran-Iraq War | Gulf War |
|---|---|---|
| Period | 1980–1988 | 1990–1991 |
| Main invasion | Iraq attacked Iran | Iraq invaded Kuwait |
| Oil impact | Production and shipping disruption | Large immediate production loss |
| Major shipping risk | Tanker War | Gulf shipping and regional security |
| Major oil concern | Iran/Iraq production and exports | Kuwait + Iraq supply |
| Saudi Arabia | Important regional and oil producer | Directly threatened by Iraq’s advance |
| U.S. role | Increasing Gulf security involvement | Led coalition against Iraq |
| Oil-price impact | Major historical oil shock | Sharp immediate oil-price increase |
| Infrastructure damage | Oil facilities and shipping affected | Kuwait oil wells and facilities heavily damaged |
26. The Timeline in One View
1978–79
Iranian Revolution disrupts Iranian oil production.
1980
Iran-Iraq War begins.
1980–81
Oil supply becomes tighter and prices rise sharply.
1984 onward
The Tanker War increases risks to Gulf shipping.
1987–88
The United States becomes more directly involved in protecting Gulf shipping.
August 1988
Iran-Iraq War ceasefire takes effect.
August 2, 1990
Iraq invades Kuwait.
August 1990
Iraqi and Kuwaiti oil supplies are severely disrupted.
January 1991
Coalition air campaign begins.
February 1991
Coalition ground campaign begins.
February 28, 1991
Major combat operations end.
1991
Kuwait’s damaged oil infrastructure is repaired and burning wells are gradually extinguished.
27. What the Average American Should Understand
You do not need to understand every military operation to understand the oil market.
Think about three simple questions:
Question 1: How much oil is available?
If supply falls, prices can rise.
Question 2: Can other countries replace the missing oil?
If Saudi Arabia or other producers can increase production, the shock may be smaller.
Question 3: Can the oil safely reach buyers?
Even if oil exists underground, shipping problems can create another supply risk.
This is why the Persian Gulf is so important to the global economy.
28. The Simple Formula
The entire story can be remembered with one formula:
War
→
Oil production risk
→
Shipping risk
→
Supply uncertainty
→
Higher risk premium
→
Crude oil price pressure
→
Higher fuel costs
→
Higher transportation costs
→
Pressure on businesses and consumers
This is the basic economic connection.
Conclusion
The history from the Iranian Revolution to the Iran-Iraq War and then the 1990-91 Gulf War shows why oil has always been closely connected to global security.
The Iranian Revolution first disrupted a major oil producer.
The Iran-Iraq War then created years of production, infrastructure and shipping risks.
The Tanker War made the Persian Gulf even more dangerous for commercial shipping.
Then Iraq’s 1990 invasion of Kuwait created another major supply shock. Nearly all Iraqi and Kuwaiti oil production went offline, with the combined loss reaching about 4.3 million barrels per day at the peak. Oil prices jumped sharply.
The lesson for today’s oil market is straightforward:
Oil prices depend not only on how much oil is in the ground. They also depend on whether that oil can be produced, transported and delivered safely to the world market.
That is why events in the Persian Gulf can matter to a driver in Texas, a trucker in Ohio, an airline passenger in New York or a factory in California.
The oil market is global.
And history shows that when the supply chain is threatened, the economic effects can travel far beyond the battlefield.Saudi Oil Pipeline Attack Raises Fresh Oil-Supply Concerns: 10-Year History, Trade Data and What It Means for America
Conclusion: The Lasting Impact of the 1934 Saudi–Yemeni War
The Saudi-Yemeni War of 1934 ended nearly a century ago, but its historical impact did not disappear when the guns stopped firing. The conflict helped shape the political and territorial relationship between Saudi Arabia and Yemen for decades. The Treaty of Taif, signed in June 1934, created an important framework for relations between the two kingdoms and confirmed Saudi control over territories including Asir, Jizan and Najran.
The border question, however, continued to require diplomatic attention. Saudi Arabia and Yemen later returned to negotiations, including the 1995 Memorandum of Understanding and, most importantly, the International Border Treaty of 2000. That agreement established a definitive and permanent boundary framework between the two countries and built on the earlier arrangements associated with the Treaty of Taif.
The legacy of the 1934 war can therefore be seen in two different ways. On the battlefield, Saudi forces achieved major territorial gains and demonstrated the growing power of the newly established Saudi state. Politically, however, the conflict ultimately ended through negotiation rather than the complete conquest of Yemen. Yemen remained an independent state, while the disputed territories became part of the territorial settlement that shaped the modern Saudi-Yemeni border.
For today’s readers, the most important lesson is that the history of Saudi Arabia and Yemen cannot be understood only through the conflicts of recent decades. The events of 1934, the Treaty of Taif, later border negotiations and the 2000 boundary treaty form part of a much longer story involving territory, sovereignty, security and diplomacy.
The war is therefore not simply a story about armies moving across a map. It is a story about how a young Saudi state, a neighboring Yemeni kingdom, disputed borderlands and failed negotiations produced a military conflict—and how diplomacy eventually transformed that conflict into a lasting political and territorial arrangement.
More than 90 years later, the names of places such as Najran, Jizan, Asir, Haradh, Midi and Hodeida remain important reminders of that history. The battles ended in 1934, but the political consequences continued to influence Saudi-Yemeni relations long afterward.
Sources
- United Nations — Treaty of Taif, 1934
United Nations Treaty Database — Treaty of Taif - United Nations Peacemaker — Treaty of Taif
UN Peacemaker — Treaty of Taif - United Nations — Saudi-Yemen International Border Treaty, 2000
UN — International Border Treaty 2000 (PDF) - United Nations — Yemen Treaty Records
United Nations — Yemen Treaty Records - British Parliament — The Yemen, May 7, 1934
British Parliament Hansard — The Yemen, 1934 - British Library — Saudi-Yemeni War, 1934 Archives
British Library Archives — Saudi-Yemeni War 1934 - King Saud Library — Najran Battle
King Saud Library — Najran Battle
Editorial Note
This article uses historical and archival sources to explain the causes, military campaign, major locations, political leadership and long-term consequences of the 1934 Saudi-Yemeni War. Historical estimates of troop numbers, dates and battlefield movements may vary between sources.Saudi Oil Pipeline Attack Raises Fresh Oil-Supply Concerns: 10-Year History, Trade Data and What It Means for AmericaSaudi Oil Pipeline Attack Raises Fresh Oil-Supply Concerns: 10-Year History, Trade Data and What It Means for AmericaSaudi Oil Pipeline Attack Raises Fresh Oil-Supply Concerns: 10-Year History, Trade Data and What It Means for America
