海湾国家的合作长期以来一直受到伊朗威胁的影响——但其展现的团结掩盖了分裂

Arab Gulf countries, battered economically and physically by the war with Iran, were keen to put on a united front at a key regional meeting on April 28, 2026.

Gathering in the Saudi city Jeddah, representatives of the Gulf Cooperation Council warned the Iranian government in Tehran that an attack on any one of its six members would be taken as an attack on all. Rejecting Iran’s claims to control of the Strait of Hormuz, Qatari Emir Sheikh Tamim bin Hamad Al Thani later described the summit as embodying “the unified Gulf stance” over the conflict.

The show of togetherness may seem at odds with other recent developments that have seen members of the GCC split over policy and vision for the region – not least the United Arab Emirate’s decision to quit the oil cartel OPEC.

But to followers of Gulf politics, like myself, the scene felt familiar. Time and again, Iran has accomplished what no outside mediator could: It has pushed divided Gulf Arab states together. When tensions rise, the monarchies of the GCC – Bahrain, Qatar, UAE, Saudi Arabia, Kuwait and Oman – tend to stand united, at least publicly.

From revolution to coordination

The modern Gulf security environment was profoundly shaped by the 1979 Iranian Revolution.

Iran shares a narrow and strategically vital waterway with the Gulf states but has long differed in identity and outlook. Specifically, Iran’s Shiite revolutionary model contrasts with the Sunni-led monarchies across the region.

Before 1979, when Iran was ruled by Shah Mohammad Reza Pahlavi Iran and Saudi Arabia, the largest of the Sunni Arab Gulf states, were regarded by Washington as “twin pillars,” protecting American interests in the Middle East. Their relationship was cooperative, but not close.

Then the emergence of the Islamic Republic after the revolution in 1979 introduced a new kind of regional actor – one defined not only by state power but also by Shiite ideological ambition.

Gulf monarchies’ concern over both external security and internal stability was reinforced by the 1979 Grand Mosque seizure in Saudi Arabia, when Islamist militants seized Islam’s holiest site. The event, alongside Iran’s revolution, exposed the vulnerability of Gulf regimes to religiously driven upheaval.

In response to this revolution ideology, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the UAE established the GCC in 1981. Although officially framed as a platform for economic and political cooperation, the organization also reflected shared security concerns and Arab identity.

But unity had limits. Member states did not all view threats to their respective regimes in the same way.

Saudi Arabia worried about U.S. pressure for reforms; Kuwait feared neighboring Iraq; Bahrain was concerned about Iran’s influence over its own Shiite population; and the UAE worried about both Iran and its own large foreign workforce. Meanwhile, Oman and Qatar followed a more independent or balanced approach.

These differences would shape the trajectory of the GCC, and Arab Gulf states’ relationship with Tehran.

The eight-year Iran–Iraq War, which began in 1980, brought to the fore fears of Iran’s influence across the region. While Oman declared neutrality, other GCC states supported Iraq by funneling billions of dollars to the regime of Saddam Hussein.

This revealed an early pattern: Gulf states could coordinate politically, but avoided acting as a single strategic bloc. The GCC broadly favored Iraq as a counterweight to Iran, but there was no unified strategy or formal policy.

Security dependence

The Iraqi invasion of Kuwait in 1990 reshaped the region’s security structure again. In early 1991, the move prompted a U.S.-led coalition, including Saudi Arabia and other Gulf states, to expel Iraqi forces. Saudi Arabia’s role was especially significant: It not only hosted coalition forces but also actively participated militarily – marking one of the first major episodes in which a GCC state was directly involved in the defense of another member.

During – and especially after – the Gulf War, GCC states deepened their reliance on the United States, agreeing to host U.S. military bases and expanding long-term defense cooperation.

This external security umbrella provided a measure of stability, but it also introduced new differences. While Saudi Arabia, Kuwait, the UAE and Bahrain aligned more closely with Washington’s strategic framework, others – notably Oman and Qatar – maintained a more flexible approach. As a result, the appearance of unity coexisted with growing variation in national strategies.

This pattern has continued in recent years, significantly through diplomatic moves to normalize ties with Israel under the Abraham Accords. While the UAE and Bahrain moved quickly to formalize ties with Israel, others remained more cautious.

The effort to contain Iran

When it comes to combating Iranian influence, GCC states have long played different roles.

Oman has consistently acted as a mediator, maintaining open channels with Tehran and facilitating quiet diplomacy — including back-channel talks between Iran and Western states.

Qatar also kept communication open, partly because of shared economic interests with Iran – particularly the management of the North Field/South Pars gas reserve.

Saudi Arabia and the UAE, by contrast, have generally taken a more cautious and at times confrontational stance toward Iran. Both view Iran as a regional competitor and a source of security concerns, particularly due to Tehran’s missile program and its support for ideologically opposed non-state actors.

This contrasting approach to Iran across the GCC allows different states to engage Tehran through multiple channels, but it also makes it harder to form a consistent, unified GCC strategy.

A changing regional balance

The 2003 Iraq War marked a turning point in the GCC-Iran dynamic. The removal of Iraq as a regional counterweight allowed Iran to expand its influence.

And this development sharpened divisions within the GCC.

Saudi Arabia and the UAE increasingly viewed Iran as a direct strategic threat requiring containment. Qatar and Oman, however, emphasized dialogue and mediation.

These differences became more visible during the Qatar diplomatic crisis of 2017. The dispute centered around Qatar’s support for Islamist political groups such as the Muslim Brotherhood, considered a terrorist organization by the UAE and Saudi Arabia.

Saudi Arabia, the UAE and Bahrain severed diplomatic ties with Qatar and imposed a full air, land and sea blockade in June 2017. The three nations accused Qatar of supporting extremist groups and maintaining close ties with Iran. Isolated, Qatar relied on Iran for airspace, trade routes and supplies, strengthening the relationship between the countries. The blockade eventually ended in January 2021, when the parties signed a declaration restoring diplomatic and trade relations at a GCC summit in Saudi Arabia.

GCC under attack

The series of events that began with the Oct. 7, 2023, attack by Iranian-backed Hamas in Israel shook up GCC relations with Tehran.

In June 2025, in response to the U.S.-Israeli attack on Iran, Tehran struck a U.S. base in Qatar – the first such attack on a GCC state by Tehran.

At an extraordinary meeting in Doha, Qatar’s capital, GCC members pledged full solidarity with Qatar and strongly condemned the Iranian attack.

But it was not enough to prevent Iran from attacking all six GCC states in response to the ongoing conflict begun in February 2026 by U.S. and Israel.

The subsequent closure of the Strait of Hormuz, affecting 20% of global oil supplies, has sparked what many see as the biggest crisis in the Gulf since the inception of the GCC.

The GCC responded by emphasizing collective security and unity. But yet again, the public show of togetherness masks divergent views on how to respond. When the war ends, each state will likely return to its own strategic and foreign policy approach.

Understanding the pattern

Since 1979, Tehran’s actions in the Gulf region have exposed two parallel developments. On the surface, there are shared concerns among GCC members and public shows of unity. But underneath this facade of unity, each state has continued to develop its own national priorities and risk tolerance.

The combination of these two factors helps explain why the GCC often appears unified during crises, while remaining internally divided over how to respond to them.

Rather than viewing the GCC as a fully cohesive bloc, it may be more accurate to see it as a framework where cooperation and disagreement coexist.

Firmesk Rahim does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.