The renewed tensions between Israel and Iran have once again exposed a fundamental reality of the modern global economy: oil remains one of the most strategic resources shaping international conflict and stability. Military exchanges, attacks on shipping routes, and threats to energy infrastructure across the Middle East have already triggered volatility in global energy markets.

The focal point of concern lies in the Strait of Hormuz, the narrow maritime corridor connecting the Persian Gulf to the global ocean trade network. Nearly 20% of the world’s oil supply passes through this chokepoint each day, making it one of the most strategically sensitive shipping routes in the world. Any disruption in this corridor has the potential to destabilize global energy markets within days.

The Israel–Iran confrontation therefore illustrates a broader historical pattern: wars and geopolitical conflicts frequently revolve around energy resources, while wars themselves also reshape global oil markets. From the mechanized battles of the World Wars to the oil embargoes of the 1970s and the Gulf conflicts of the late twentieth century, oil has repeatedly influenced both the causes and consequences of international conflict.

Understanding the relationship between oil, war, and global power requires examining how energy resources have shaped geopolitical strategy over the last century.

This article examines how oil has shaped global conflicts for over a century—from the World Wars and the 1970s oil shocks to today’s Israel–Iran tensions—and why energy security continues to influence geopolitics and economic stability.

The Oil–War Nexus: Three Structural Patterns

Historical analysis suggests that oil influences conflict through three major mechanisms:

1. Wars fought to control oil resources
   States attempt to capture or secure oil reserves and energy-producing territories.
2. Wars that disrupt oil supply systems
   Conflicts occurring in energy-producing regions create global supply shocks.
3. Oil used as a geopolitical weapon
   Governments manipulate oil production or exports to exert political pressure.

These three patterns have defined global geopolitics since the early twentieth century.

Oil and the Mechanization of Warfare

Before the twentieth century, coal powered most military logistics. However, the rise of mechanized warfare transformed oil into the lifeblood of military power.

Navies shifted from coal-powered ships to oil-powered fleets, aircraft required aviation fuel, and armies increasingly depended on trucks and tanks. Control over oil supplies therefore became synonymous with military capability.

Winston Churchill’s decision in the early 1900s to convert the British Royal Navy from coal to oil marked one of the earliest strategic recognitions of oil’s military importance. This transition also prompted Britain to secure energy access through geopolitical influence in the Middle East.

From this moment onward, energy security became inseparable from national security.

World War I: The First Oil War

World War I marked the first major conflict in which oil played a decisive role.

Motorized transport, aircraft, and armored vehicles dramatically increased fuel consumption. Countries without sufficient oil reserves struggled to sustain mechanized military operations.

Germany faced severe oil shortages during the war, while the Allied powers benefited from access to oil supplies from the United States and the Middle East. Oil pipelines and refineries became critical strategic assets.

The war also reshaped the political geography of the Middle East, particularly in territories formerly controlled by the Ottoman Empire. These regions would later become some of the most important oil-producing areas in the world.

World War II: Oil as a Strategic Target

By World War II, oil had become central to military strategy.

Germany’s invasion of the Soviet Union was partly driven by the goal of capturing the Caucasus oil fields, which were essential to sustaining its military machine. Similarly, Japan’s expansion into Southeast Asia followed Western oil embargoes that threatened its industrial capacity.

Oil infrastructure became one of the most heavily targeted assets during the war. Allied bombing campaigns frequently focused on refineries, fuel depots, and synthetic fuel facilities.

The Cold War Era and the Rise of Oil Geopolitics

Following World War II, the geopolitical significance of oil increased dramatically. The Middle East emerged as the center of global petroleum production, while industrial economies in Europe, North America, and Asia became increasingly dependent on imported energy.

The Cold War also introduced new strategic dynamics. Superpowers competed for influence in oil-producing regions, recognizing that energy access was essential to economic and military power.

At the same time, oil-producing countries began to realize their own strategic leverage.

The 1973 Oil Crisis: Energy as a Political Weapon

One of the most significant demonstrations of oil’s geopolitical power occurred during the 1973 Arab–Israeli War, when Arab members of the Organization of Petroleum Exporting Countries (OPEC) imposed an oil embargo against countries supporting Israel.

The embargo triggered one of the largest energy shocks in modern history.

Oil prices rose from roughly $3 per barrel to nearly $12 per barrel within a year, causing severe economic disruptions across the global economy. Inflation surged, economic growth slowed, and many countries faced energy shortages.

The crisis revealed that oil could be used not only as a resource but also as a strategic instrument of geopolitical pressure.

The Iranian Revolution and the Second Oil Shock

Another major energy shock occurred in 1979 following the Iranian Revolution.

Although global oil production declined only modestly, uncertainty surrounding Iran’s political transformation caused panic in energy markets. Oil prices more than doubled within a year, triggering a second global energy crisis.

These events reinforced the sensitivity of global markets to political instability in major oil-producing regions.

The Iran–Iraq War and the Militarization of Oil Shipping

The Iran–Iraq War (1980–1988) further demonstrated the vulnerability of energy infrastructure during conflicts.

Both sides targeted oil tankers and shipping routes in the Persian Gulf in what became known as the “Tanker War.” Attacks on oil exports disrupted global energy supplies and increased insurance costs for maritime shipping.

The conflict also highlighted the strategic importance of protecting energy transport corridors.

The Gulf War: Control of Oil Resources

The Gulf War of 1990–1991 represented one of the most direct examples of oil geopolitics shaping military intervention.

Iraq’s invasion of Kuwait was partly motivated by the desire to control Kuwait’s vast oil reserves. The international coalition that expelled Iraqi forces was driven not only by territorial concerns but also by the need to protect global oil supply stability.

During the war, Iraqi forces set fire to hundreds of Kuwaiti oil wells, causing massive environmental damage and temporarily reducing global oil production.

Energy Infrastructure as a Target in Modern Warfare

In modern conflicts, energy infrastructure has become one of the most vulnerable strategic assets.

Oil refineries, pipelines, and shipping terminals represent critical nodes within global supply networks. Attacks on these facilities can simultaneously weaken national economies and disrupt international energy markets.

Drone strikes, cyberattacks, and missile strikes against energy facilities have become increasingly common in recent years, reflecting the strategic importance of these assets.

The Middle East: The Center of Global Energy Geopolitics

The Middle East remains the focal point of global oil geopolitics.

The region holds nearly half of the world’s proven oil reserves, and several of the world’s largest oil exporters operate there. Key maritime routes such as the Strait of Hormuz serve as critical arteries for global energy supply.

As a result, conflicts in the region often have global economic consequences.

Even localized military confrontations can trigger oil price spikes, affecting inflation, transportation costs, and trade flows worldwide.

Economic Consequences of Oil-Driven Conflicts

Energy-related conflicts rarely remain confined to military arenas. Their economic consequences often ripple across the global economy.

• Inflation and Energy Prices: Oil price increases raise transportation and manufacturing costs, which in turn drive inflation across multiple sectors.
• Trade and Supply Chains: Higher fuel prices increase shipping costs and disrupt global supply chains, affecting industries ranging from agriculture to manufacturing.
• Strategic Energy Policies: In response to repeated oil shocks, many countries established strategic petroleum reserves and began investing in alternative energy sources.

These policies aim to reduce vulnerability to geopolitical disruptions in energy supply.

The Energy Transition and the Future of Resource Conflicts

As the world gradually transitions toward renewable energy sources, some analysts argue that oil-driven conflicts may decline.

However, the energy transition introduces new geopolitical challenges.

Renewable technologies depend on critical minerals such as lithium, cobalt, and rare earth elements. Competition for these resources may create new forms of geopolitical rivalry.

Moreover, global transportation systems still rely heavily on petroleum. For the foreseeable future, oil will remain a critical component of the global energy mix.

Oil as Both Driver and Barometer of Global Conflict

The history of modern geopolitics cannot be understood without recognizing the role of oil.

From the mechanized warfare of the World Wars to the oil embargoes of the 1970s and the conflicts of the Middle East, energy resources have repeatedly shaped global power dynamics.

The current Israel–Iran tensions illustrate how vulnerable the global energy system remains. Disruptions in a single shipping corridor or oil-producing region can reverberate through global markets within days.

Oil therefore serves not only as a driver of conflict but also as a barometer of geopolitical stability.

As long as modern economies depend on petroleum, the relationship between energy and international conflict will remain one of the defining features of global politics.