Saudi Arabia’s new maritime defence architecture exposes a contradiction at the centre of the emerging Red Sea security order. The waterways Riyadh wants to protect are geographically clear: the Red Sea, Bab al Mandeb and the Gulf of Aden. The coalition being assembled to defend them is not. When Saudi Arabia announced the Multinational Maritime Defense Alliance on July 30, fourteen governments initially backed the initiative, while representatives from 43 countries and the European Union had participated in the discussions. Alongside Red Sea states such as Egypt, Sudan, Djibouti, Somalia, Yemen and Jordan were countries including Turkey, Pakistan, Bangladesh and Nigeria, none of which possesses a Red Sea coastline.

The composition makes geography an increasingly weak explanation for deciding who belongs inside the new security structure. Ethiopia has no coastline, but neither do Pakistan, Turkey, Bangladesh or Nigeria. Unlike those countries, Ethiopia sits directly behind the western Red Sea, has a population of more than 135 million and depends heavily on maritime access for its trade. More than 95 percent of Ethiopian import and export trade by volume has historically moved through the Addis Djibouti corridor. Its exclusion therefore cannot be explained simply by the fact that it became landlocked after Eritrean independence. Riyadh is trading geographical logic for operational muscle, political compatibility and immediate usefulness. Turkey and Pakistan fit those requirements far more comfortably than Ethiopia does under the current political environment.

The urgency behind the Saudi decision emerged from the rapidly deteriorating maritime environment. On July 20, Yemen’s Houthis announced a blockade targeting Saudi shipping at a moment when instability around the Strait of Hormuz had already increased Riyadh’s concern about the security of its eastern export routes. Saudi Arabia suddenly faced pressure at both ends of its maritime system. Hormuz had become less predictable, while Bab al Mandeb was once again exposed to Houthi coercion. Shipping through the southern Red Sea slowed as the threat intensified, pushing Riyadh to look beyond the military capabilities of the states physically bordering the waterway.

A coastline gives a country position, but it does not automatically give it the ability to intercept drones, escort commercial vessels, conduct electronic warfare or sustain prolonged naval operations. Several Red Sea states occupy strategically important territory without possessing the military capacity Saudi Arabia needs during a major regional confrontation. Turkey and Pakistan offer something different. On August 7, Saudi Arabia, Turkey and Pakistan signed the Mecca Joint Defence Agreement, creating a deeper framework for military coordination. Their discussions extended into joint land, naval and air exercises as well as cooperation in air defence, unmanned systems, electronic warfare, artificial intelligence and defence production.

There is no public evidence that Turkey or Pakistan has already received a specific drone, naval escort or electronic warfare mission within the new Red Sea alliance. Their importance lies in the capabilities Riyadh can draw on if the conflict expands. Turkey brings a large military, a capable navy and a defence industry that has developed considerable strength in drones, missiles, autonomous systems and electronic warfare. Pakistan adds experienced armed forces, naval capacity and the strategic weight of a nuclear armed state. The three governments are now building political and military mechanisms for deeper coordination. From the Saudi perspective, a state does not need to touch the Red Sea to help defend it.

Riyadh is also building around the Western maritime presence rather than necessarily trying to replace it. The European Union already operates a defensive naval mission in the Red Sea and Gulf of Aden, protecting civilian vessels through maritime surveillance, accompaniment and defensive action. Saudi Arabia’s emerging structure gives Riyadh another layer of regional military capacity while reducing its dependence on what Western governments are willing to deploy. American and European involvement remains shaped by their own political calculations and by reluctance to become more deeply involved in an expanding regional confrontation. Riyadh is therefore widening its security options instead of waiting for Western partners to carry the entire burden.

Ethiopia’s absence becomes much more significant in this context. There is no public evidence that Egypt formally vetoed Ethiopian participation, nor is there evidence that Saudi Arabia rejected an Ethiopian application to join. The stronger argument lies in the political environment that developed around Ethiopia. Egypt has spent more than a decade confronting Addis Ababa over the Grand Ethiopian Renaissance Dam and the future of Nile water management. Ethiopia’s later campaign for reliable access to the sea pushed that rivalry eastward, transforming what was primarily a Nile dispute into a wider competition involving Somalia, Eritrea and the Red Sea.

The Ethiopia Somaliland agreement accelerated that shift. Addis Ababa sought maritime access through Somaliland, including arrangements connected to a potential naval presence, while Somalia regarded the deal as a challenge to its sovereignty. Egypt responded by moving closer to Mogadishu and strengthening its relationship with Eritrea. In October 2024, Egypt, Eritrea and Somalia agreed to deepen their security cooperation, increasing the diplomatic pressure surrounding Ethiopia. By May 2026, Cairo had sharpened its position further. During talks in Asmara, Egypt argued that Red Sea governance and security should remain in the hands of littoral states and rejected the involvement of outside actors.

Ethiopia was not explicitly named in that declaration, so it should not be presented as proof that Cairo blocked Ethiopian membership. Yet the political direction is difficult to separate from Ethiopia’s maritime ambitions. Egypt has consistently resisted developments that could give Addis Ababa a permanent strategic position on the Red Sea. More importantly, Cairo has helped reinforce a regional order in which Ethiopia remains outside formal Red Sea institutions despite its enormous economic dependence on the waterway.

Saudi Arabia then weakened the littoral argument through its own membership choices. If only coastal countries should participate in Red Sea security, there is no clear reason for Turkey, Pakistan, Bangladesh or Nigeria to enter the structure. Their admission shows that Riyadh bends geography when another country offers enough military or political value. Ethiopia therefore faces a different obstacle. The issue is not simply that it lacks a coast. Bringing Addis Ababa inside would force Saudi Arabia to manage disputes involving several of the partners it already considers more immediately useful.

Egypt carries particular weight in that calculation because the present maritime crisis has increased its importance to Saudi energy security. Houthi pressure has encouraged Saudi Arabia to use Egypt’s northern infrastructure more heavily, allowing crude to move toward the Mediterranean when passage through Bab al Mandeb becomes more dangerous. Saudi crude shipments through the Sidi Kerir route increased as Red Sea threats intensified. Saudi Arabia still possesses its own alternatives, including the East West pipeline linking its production areas with the Red Sea coast, but Egypt gives Riyadh an additional northern exit from the Red Sea at a time when both Hormuz and Bab al Mandeb have become sources of vulnerability.

Saudi Arabia therefore has little reason to create unnecessary tension with Cairo over Ethiopian participation in an emergency maritime structure. Egypt does not need to formally instruct Riyadh to exclude Ethiopia. Its strategic importance, control of the Suez route, cooperation with Saudi Arabia and growing role in the kingdom’s western energy options already shape the cost of Saudi decisions. Riyadh can simply calculate that admitting Ethiopia offers fewer immediate benefits than preserving smooth coordination with Egypt.

The widening split between Saudi Arabia and the United Arab Emirates makes the Ethiopian question even more complicated. Their rivalry, once concentrated heavily in Yemen, has spread into the Horn of Africa. By early 2026, Saudi Arabia was drawing closer to Egypt, Turkey and Qatar while the UAE maintained extensive political and economic networks in Ethiopia and elsewhere in the Horn. Sudan sharpened the divide. Egypt strongly supports the Sudanese Armed Forces, while the UAE has repeatedly faced accusations of backing the Rapid Support Forces, allegations Abu Dhabi denies. Reporting in February also linked Ethiopia to a facility where RSF fighters were allegedly being recruited and trained, although Ethiopian authorities did not publicly respond to the investigation.

From Riyadh’s perspective, when it comes to Ethiopia, the problem is the accumulation of disputes around Ethiopia. Egypt brings the Nile conflict. Somalia brings the Somaliland question. Eritrea brings renewed tension with Addis Ababa. Sudan introduces another contested regional alignment, while competition between Saudi Arabia and the UAE now runs through several of these relationships. Admitting Ethiopia would bring all of those tensions into a coalition that Riyadh designed for a much narrower purpose: protecting maritime traffic and deterring Houthi attacks.

The economic contradiction is much harder to ignore. Ethiopia is one of the largest markets surrounding the Red Sea and Horn of Africa, with its population estimated at roughly 135.9 million in 2025. Its commercial dependence on Red Sea ports is not a temporary condition but a structural feature of the Ethiopian economy. Djibouti’s port system, transport infrastructure and logistics sector depend heavily on Ethiopian trade. Saudi Arabia is therefore building a security architecture to protect maritime routes essential to Ethiopia while leaving one of the largest economies connected to those routes outside the political structure defending them. Exclusion may make Saudi military coordination easier today, but it creates a wider political problem for the future.

Eritrea’s absence tells a different story. Eritrea owns a long Red Sea coastline, controls Massawa and Assab and sits directly opposite the Arabian Peninsula. Yet Saudi Arabia continued engaging Asmara shortly before the maritime coalition emerged. In February 2026, President Isaias Afwerki held talks with a senior Saudi delegation on political, economic and security cooperation. The relationship had not broken down. Eritrea’s absence therefore cannot automatically be read as Saudi rejection.

Asmara also has reasons to remain outside. Eritrea has repeatedly argued that the countries bordering the Red Sea should carry primary responsibility for the security of the waterway, a position that Egypt publicly supported during its discussions with Eritrea in May 2026. A Saudi structure that brings Turkey, Pakistan and other outside powers into Red Sea security sits uneasily with that doctrine. Eritrea can cooperate with Saudi Arabia while still refusing to place itself fully inside a wider multilateral framework.

This approach also matches Eritrea’s broader preference for bilateral relationships. Formal alliances create obligations and reduce room for manoeuvre. Direct relations allow Asmara to work with Saudi Arabia, Egypt, the UAE or another power when interests overlap without tying itself permanently to a larger bloc. Saudi Arabia can tolerate that arrangement because it does not need Eritrea formally inside the alliance to preserve diplomatic access or security cooperation. Eritrea’s geography remains valuable whether or not Asmara signs onto every Saudi led institution.

Ethiopia and Eritrea therefore represent two very different absences. Eritrea can remain outside while maintaining a useful bilateral relationship with Riyadh. Ethiopia sits behind a dense collection of disputes that make formal inclusion politically expensive. One can preserve strategic value without membership. The other has become entangled in enough regional rivalries that Saudi Arabia currently finds exclusion more convenient than integration.

The danger for Riyadh begins if an emergency security calculation hardens into a permanent political order. Ethiopia has already elevated maritime access into a national strategic issue, while tensions with Eritrea have again intensified. In early 2026, Ethiopia and Eritrea exchanged accusations of aggression as Addis Ababa continued signalling willingness to discuss access through Assab. If Ethiopia concludes that regional institutions will exclude it regardless of its economic dependence on the Red Sea, unilateral approaches to maritime access could become more attractive.

That outcome would work directly against Saudi interests. A negotiated Ethiopian commercial corridor could be managed through agreements, guarantees and economic arrangements. An attempt to acquire maritime influence through pressure, military positioning or confrontation over Assab would pull Egypt, Eritrea, Somalia and Gulf powers into a far more dangerous regional contest. Saudi Arabia therefore has an interest in separating temporary military exclusion from permanent strategic isolation. The first may keep the current coalition focused. The second could help create the next crisis.

Saudi Arabia’s new alliance has already demonstrated that the future of Red Sea security will not be decided by the map alone. Turkey and Pakistan have no coastline there, yet Riyadh values the capabilities and deterrence they can contribute. Eritrea owns the coastline but has reasons to preserve the freedom of bilateral diplomacy. Ethiopia commands enormous economic weight but currently carries too many political complications for Saudi Arabia to bring it comfortably into the coalition.

That calculation can work while Riyadh concentrates on the immediate Houthi threat. It becomes much harder to defend as a permanent regional strategy. Saudi Arabia can confront a maritime emergency without Ethiopia, but building a stable political and economic order around the Red Sea while permanently treating Addis Ababa as an outsider is a different proposition. Riyadh has already shown that geography is flexible when strategic interests demand it. The remaining question is whether that flexibility will eventually extend to Ethiopia, or whether Saudi Arabia will continue protecting the maritime system on which Ethiopia depends while denying Addis Ababa a meaningful role in shaping it.

By Makda Girma, Researcher, Horn Review