On July 28, the foreign ministers of Gabon and Equatorial Guinea met on the sidelines of the African Union's 49th Ordinary Session and signed what both governments describe as a "joint commitment mechanism" — an agreement that formally implements, rather than reopens, a territorial ruling that had remained unresolved for more than five decades. Beyond settling a long-standing dispute, the accord removes one of the key legal obstacles to future offshore oil and gas investment in the Gulf of Guinea. Dieudonné Aba'a Owono signed on behalf of Gabon. Simeón Oyono Esono Angüe signed for Equatorial Guinea, with African Union Commission Chair Mahmoud Ali Youssouf serving as witness.
The dispute itself concerned three small islands — Mbanié, Cocotiers and Conga — located in Corisco Bay between the two countries. Legally, the issue was settled on May 19, 2025, when the International Court of Justice traced sovereignty back to the 1900 Franco-Spanish Convention, which established the colonial-era boundary in the Gulf of Guinea. This latest agreement addresses what comes after a court ruling: Gabon has now committed to withdrawing its military presence from Mbanié, while both governments will establish a joint technical committee to oversee implementation. For most of the past fifty years, however, the islands themselves were never the real issue. Barely inhabited, they mattered primarily because sovereignty over them determines where the maritime frontier is drawn — and that, in turn, determines which country has the legal authority to issue offshore exploration licences in one of the Gulf of Guinea's more promising underexplored hydrocarbon basins.
The Offshore Potential Behind the Dispute
Corisco Bay sits within a resource-rich offshore zone at a time when both Gabon and Equatorial Guinea are actively seeking new upstream investment. Gabon has accelerated efforts to attract international energy companies through new production-sharing contracts expected with BP and ExxonMobil, VAALCO Energy's ongoing drilling campaign, BW Energy's expanding Dussafu development, and reforms introduced by Petroleum Minister Clotaire Kondja since January. Equatorial Guinea faces a different challenge. With production from its mature offshore fields continuing to decline, opening new exploration acreage has become a strategic priority for sustaining future hydrocarbon revenues.
For international energy companies, unresolved sovereignty questions create commercial risk. Operators rarely commit capital to blocks where ownership remains contested because any discovery could become legally difficult to finance, insure or develop. For decades, uncertainty surrounding Corisco Bay acted as a hidden barrier to investment, not because the geological potential was lacking, but because no company wanted to become the first to test competing legal claims.
What Actually Changes
The July agreement does not immediately launch exploration campaigns or allocate new licences. What it does accomplish is the removal of a major legal uncertainty that has effectively limited commercial interest in the basin for decades.
With Equatorial Guinea's sovereignty now entering the implementation phase rather than remaining subject to litigation, and with Gabon formally committing to withdraw its military presence, both governments are now positioned to clarify offshore licensing jurisdictions. That legal certainty represents one of the most important prerequisites for attracting the long-term investment required by offshore oil and gas projects. The technical committee established under the agreement will play a central role in that process. Maritime delimitation rarely ends with a court judgment alone. Authorities must still coordinate licensing boundaries, address any overlapping concessions, engage existing licence holders and establish the predictable regulatory environment international investors expect before committing significant capital.
A Signal Beyond Corisco Bay
The significance of the agreement extends beyond Gabon and Equatorial Guinea. The Gulf of Guinea still contains several unresolved maritime questions where overlapping historical claims continue to complicate offshore resource development. A peaceful, African Union-supported implementation of an ICJ ruling offers a practical model for resolving such disputes through legal institutions rather than prolonged political confrontation.
For countries competing to attract international upstream investment, reducing legal uncertainty carries economic value in its own right. Stable maritime boundaries provide companies with greater confidence that exploration rights will remain secure throughout projects that often span several decades.
More Than a Territorial Settlement
For over fifty years, three small islands delayed agreement over an offshore boundary. The islands themselves were never the strategic prize. The surrounding waters were. If the implementation process proceeds as planned, Corisco Bay may finally begin attracting the kind of long-term exploration investment that legal uncertainty has discouraged for decades. More broadly, the agreement demonstrates that resolving territorial disputes can unlock economic opportunities that extend far beyond diplomacy itself — opening the way for new energy development, stronger investor confidence and greater regional stability.
