The diplomatic chessboard in the Eastern Mediterranean appears to be entering a phase of prolonged, albeit fragile, stability. The recent meeting between Greek Prime Minister Kyriakos Mitsotakis and Turkish President Recep Tayyip Erdogan on the sidelines of the NATO Summit did not produce spectacular news, but it did confirm a mutual desire to maintain 'calm waters.' In a period where the international system is shaken by conflicts in Ukraine and the Middle East, Athens and Ankara are choosing the path of managing differences rather than escalation, without, however, retreating from their core national positions.

The Arms Strategy: F-35 vs. F-16

A central point of discussion, though not always on the official agenda, is the shifting balance of power through defense procurement programs. Greece is moving rapidly toward the F-35 era, a development that grants it a clear technological edge in the air. The recent approval by the US Congress and the initiation of the acquisition of the first squadron of fifth-generation stealth fighters is a 'red flag' for Ankara, which remains outside the program due to its purchase of Russian S-400s.

On the other hand, Erdogan is attempting to balance the situation by modernizing Turkey's F-16 Viper fleet and purchasing new aircraft from the US. Washington is using defense sales as both a 'carrot and a stick,' pushing for unity in NATO's southeastern flank. For Athens, superiority is not an end in itself but a means of deterrence, while for Ankara, it is a matter of regional prestige and strategic autonomy. This balance is delicate, as every new delivery of weapon systems causes nervousness on the other side, despite assurances of peaceful coexistence.

The Thorn of Casus Belli and International Legality

Despite the positive atmosphere, Turkey has not moved an inch from its long-standing claims. The Casus Belli (cause for war) in the event of Greece extending its territorial waters to 12 nautical miles remains on the table, representing an anachronistic but active threat. The Greek side, with steadfastness, counters with International Law and the Law of the Sea (UNCLOS), emphasizing that the country's sovereign rights are not subject to negotiation.

  • Ankara's persistence in the 'Blue Homeland' (Mavi Vatan) doctrine.
  • Disputing the entitlement of islands to maritime zones.
  • Attempts to create 'grey zones' in areas of Greek jurisdiction.

These issues remain the 'mines' beneath the surface of the calm waters. Kyriakos Mitsotakis has made it clear that rapprochement does not mean naivety. Greece is investing in its alliances, strengthening its footprint in the EU and the US, and expects tangible proof from Turkey that goes beyond the rhetoric of friendship.

The 'Positive Agenda' as a Diplomatic Tool

In the realm of low-level politics, things are much more encouraging. The so-called 'positive agenda'—which includes cooperation in economy, tourism, environment, and migration management—is bearing fruit. The visa facilitation for Turkish citizens visiting Greek islands in the Eastern Aegean is a prime example that boosts local economies and brings the two peoples closer together.

"Geography destined us to live side by side. It is our duty to transform neighborhood from a source of tension into an opportunity for prosperity," diplomatic sources often state.

However, economic cooperation cannot substitute for the resolution of major geopolitical differences. It functions more as a 'lightning rod' that absorbs shocks from political friction. The question that remains unanswered is whether this period of calm is a deep-seated strategic choice or a tactical move by President Erdogan to return Turkey to the Western camp and secure economic support and armaments.

Conclusion: Realism and Vigilance

2026 finds Greek-Turkish relations at a turning point. The NATO Summit confirmed that neither side desires a military incident, but neither side is ready for the 'grand concession' that would lead to the International Court of Justice in The Hague. Greece must continue to proceed with the realism of strong deterrence and the composure of open diplomacy. 'Calm waters' are welcome, but in the Aegean, the weather changes fast. The next phase will be judged by the consistency of words and deeds, especially when the first F-35s begin landing at Greek bases.