FEATURE STORY: The Aegean Sea Is Once Again Becoming a Minefield Between Athens and Ankara

Turkish Defense Minister Takes a Harder Line

Turkish Defense Minister Yaşar Güler recently stated that his country possesses “the power and determination to neutralize any threat to Turkish security,” a bellicose statement that, while not explicitly directed at Greece, clearly fits within the tense context of the current territorial disputes in the Aegean Sea.

This type of strong rhetoric, common in contemporary Turkish political discourse, nevertheless contributes to fueling a climate of mutual distrust that further complicates the search for an amicable diplomatic resolution between the two neighboring countries and NATO allies.

Athens’s measured but firm response

Greek Foreign Minister Georgios Gerapetritis described the current situation as an “extremely fragile geopolitical environment,” a diplomatic formulation that nonetheless reflects genuine and serious concern within the Greek government regarding the repeated legal provocations by its Turkish neighbor.

This Greek rhetorical caution, which contrasts with the firmness of Turkey’s rhetoric, should not be interpreted as a sign of weakness: Athens has also publicly raised the risk of a genuine “casus belli” should Turkey persist with some of its most extreme claims.

I note that Greece’s diplomatic restraint, however wise it may be from a tactical standpoint, should not obscure the true gravity of the situation; the very mention of the term “casus belli” attests to the seriousness with which Athens views this issue.

The NATO Summit in Ankara: An Awkward Coincidence

This resurgence of tensions comes just a few months before a major NATO summit scheduled to take place in Ankara—a timing coincidence that has not escaped the notice of any astute observer of the region. This legal provocation by Turkey, occurring so close to a major diplomatic event crucial to Turkey’s international image, raises legitimate questions about the real motivations behind this timing.

Several regional analysts believe that Turkey may be seeking to negotiate from a position of strength ahead of this summit, using these territorial claims as additional leverage in its broader relations with its Western partners within the Atlantic Alliance.

An Unstable Regional Context That Encourages Opportunism

Greece openly accuses Ankara of taking advantage of the unstable regional context—marked by the war in Ukraine and tensions in the Middle East—to advance its own territorial claims while international attention remains focused on other crises deemed priorities by the global diplomatic community.

This Greek accusation—difficult to prove formally but strategically plausible—illustrates how major regional powers often exploit periods of international geopolitical distraction to advance territorial agendas they would not necessarily dare to pursue during times of global diplomatic calm.

I believe this Greek accusation of Turkish opportunism deserves to be taken seriously, as recent diplomatic history is replete with examples of regional powers taking advantage of major international crises to discreetly advance their own territorial interests.

Two allies who should stand together in the face of common threats

Greece and Turkey, both NATO members for several decades, should logically join forces to confront the common threats posed by Russia in the Black Sea and the instability in the Middle East, rather than devoting a significant portion of their diplomatic and military resources to bilateral territorial disputes that in some cases date back several generations.

This persistent rift between two theoretically allied members objectively undermines the collective credibility of the Atlantic Alliance, potentially offering opportunities for strategic adversaries seeking to divide and weaken Western cohesion as a whole.

A Worrying Precedent for Other Territorial Disputes

This Greek-Turkish dispute also sets a potentially troubling precedent for other latent territorial disputes elsewhere in the Western world, illustrating how long-standing legal disagreements can resurface abruptly once the regional or international geopolitical context offers a window of opportunity perceived as favorable by one of the parties involved.

The Western partners of Greece and Turkey—notably the United States and the major European powers—therefore have a clear strategic interest in actively encouraging a peaceful and lasting resolution to this dispute before it escalates into a more serious confrontation.

I believe that Washington and the major European capitals should become much more involved in mediating this Greek-Turkish issue, as its continued deterioration poses a serious risk to the cohesion of NATO’s southeastern flank in the face of Russia.

Coveted Undersea Energy Resources

Beyond purely legal and symbolic considerations, this Greek-Turkish dispute also involves significant economic stakes, particularly related to the potential exploitation of undersea energy resources in certain disputed areas of the Aegean Sea and, more broadly, the eastern Mediterranean.

This economic dimension of the conflict—often underestimated in mainstream media coverage of the issue—partly explains why neither Athens nor Ankara seems willing to make significant concessions regarding maritime zones that could harbor hydrocarbon deposits of substantial economic importance for the future of both national economies.

Tourism, a Potential Collateral Casualty of the Tensions

A prolonged escalation of these territorial tensions could also negatively affect the tourism sector in both countries, which is particularly dependent on the regional stability perceived by international visitors—who generally favor destinations where geopolitical risks appear minimal and well managed by local authorities.

Paradoxically, this shared economic vulnerability serves as a powerful argument for rapid de-escalation, as both countries have a common and tangible economic interest in preserving the regional stability necessary to sustain their respective tourism industries—which are particularly lucrative during the current summer season.

I find it ironic that two countries so dependent on Mediterranean tourism for their economic prosperity continue to flirt with a territorial escalation that could, if it were to seriously escalate, directly harm their most fundamental economic interests.

Old wounds that have never truly healed

This territorial dispute is part of a much longer history of tensions between Greece and Turkey, marked by successive conflicts since the fall of the Ottoman Empire, including the 1974 Cyprus crisis, which continues to this day to poison bilateral relations between the two neighboring nations.

This heavy historical legacy partly explains why every new provocation—even one that appears minor—resonates disproportionately with public opinion in both countries, making any lasting reconciliation more difficult despite the obvious common interests shared by Athens and Ankara within the Atlantic Alliance.

Mutual mistrust fueled by decades of nationalist rhetoric

Over the decades, political leaders in both countries have at times exploited this territorial dispute for domestic political purposes, capitalizing on the nationalist sentiment of their respective populations to bolster their own electoral popularity rather than actively seeking a peaceful and lasting resolution to the dispute.

This political exploitation of the conflict, evident on both the Greek and Turkish sides, further complicates international mediation efforts, as the leaders of both countries have little room to maneuver to make concessions without exposing themselves to accusations of national weakness from their domestic political opponents.

I believe that this political exploitation of nationalism on both sides of the Aegean Sea constitutes one of the main obstacles to a lasting resolution of this dispute, far more so than the legal issues themselves.

Active Mediation Rather Than Passive Neutrality

Rather than merely issuing general calls for restraint, the major Western powers—notably the United States and the leading European capitals—should engage more actively in structured mediation between Athens and Ankara, drawing on existing diplomatic mechanisms within NATO and the European Union.

Such active mediation would require sustained diplomatic engagement over the long term, rather than ad hoc interventions during peaks of tension—an approach that has historically proven inadequate for resolving this type of complex, historically charged territorial dispute in a lasting manner.

The Potential Role of the International Court of Justice

Some diplomats also suggest bringing specific aspects of this dispute before the International Court of Justice in The Hague, an option that would provide impartial legal clarification on the most contentious issues, even though Turkey has historically shown reluctance to accept this type of binding international arbitration.

This legal avenue, though slow and uncertain, would nevertheless offer a more stable and predictable framework than the current rhetorical confrontation, which risks escalating into a more serious incident if neither party agrees to make significant concessions in the foreseeable future.

I believe that a referral to the International Court of Justice, despite its obvious limitations, would represent a significant step forward compared to the current rhetorical escalation, which only serves to exacerbate mutual mistrust between the two countries.

An issue that requires sustained international vigilance

This renewed tension between Athens and Ankara warrants sustained international attention, not because an imminent armed conflict is likely, but because the accumulation of repeated legal and rhetorical provocations inevitably creates risks of accidental escalation that are difficult to control once triggered between two nations that have historically been so distrustful of one another.

The international community—and particularly the Western partners shared by these two countries within NATO—should use the upcoming summit in Ankara to strongly encourage a lasting de-escalation of this issue, rather than allowing these tensions to continue simmering without meaningful diplomatic intervention.

A Broader Lesson on the Fragility of Alliances

This Greek-Turkish dispute serves as yet another reminder that geopolitical alliances—even those that appear as solid as NATO—remain weakened by unresolved internal tensions that require constant diplomatic attention rather than merely reactive management during periods of open crisis.

For the West as a whole, preserving the cohesion of its alliances in the face of determined strategic rivals such as Russia or China requires resolving these internal rifts before they are exploited by external adversaries seeking precisely to divide and weaken.

I believe that this Greek-Turkish crisis, as long-standing and complex as it may be, offers a unique opportunity for NATO to demonstrate its ability to peacefully resolve internal disputes among its own members—a sign of collective maturity that is particularly needed today.

Signed, Maxime Marquette, columnist