Turkey’s Balancing Act: NATO Commitments, Black Sea Security, and Regional Diplomacy in 2025

Turkey’s Balancing Act: NATO Commitments, Black Sea Security, and Regional Diplomacy in 2025
Jeffrey Bardzell / Nov, 29 2025 / Strategic Planning

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Turkey’s Strategic Tightrope in 2025

In 2025, Turkey stands at a geopolitical crossroads unlike any in its modern history. It’s a NATO member with the second-largest army in the alliance, a key player in the Black Sea, a mediator between Russia and Ukraine, and a country quietly building nuclear partnerships with China, the U.S., and South Korea-all while under pressure to double its defense budget. This isn’t just policy. It’s survival. And it’s working, for now.

NATO Membership: Loyalty with Limits

Turkey joined NATO in 1952. Today, it’s one of the alliance’s most indispensable members-not because it always agrees, but because it can’t be replaced. With 32 members now, NATO needs Turkey’s geography, its military, and its access to the Black Sea. But loyalty doesn’t mean obedience. Turkey spends $46 billion on defense in 2025, up from $40.6 billion in 2024. That’s already among the highest in NATO. But now, the alliance wants everyone to hit 5% of GDP by 2035. For Turkey, that means spending over $66 billion a year. That’s a 165% real-term increase in just a few years. No other NATO country faces this kind of fiscal shock.

So what’s the trade-off? Turkey dropped its Medium-Term Program for 2025, which planned to slowly reduce defense spending as a share of GDP. Now, it’s either raise taxes dramatically or slash public services. Neither is popular. But President Erdoğan won’t risk being seen as weak on defense. The domestic narrative is clear: Turkey is building its own military power, and NATO expects nothing less.

The Black Sea: Turkey’s Strategic Heartland

The Black Sea is where Turkey’s real power plays out. After Russia’s invasion of Ukraine, the region became a flashpoint. Russia’s navy, once dominant, is now battered by Ukrainian drones. Turkey, meanwhile, is stepping in-not as a combatant, but as the gatekeeper. Under the Montreux Convention, Turkey controls passage through the Bosporus. It can block warships. It can delay them. It can decide who gets in and who doesn’t. That’s leverage no other NATO member has.

When NATO talked about forming a Ukraine reassurance force, Turkey said yes-but only if it’s a non-combat mission and only if there’s a ceasefire. That’s not obstruction. That’s strategy. Turkey wants to be seen as essential to regional security, not just another troop contributor. It’s also using its role in the 2022 Black Sea Grain Initiative and prisoner swaps to prove it can deliver results where others fail. Analysts now say Turkish naval and air assets make up the largest share of NATO’s maritime awareness in the Black Sea. Russia’s weakness has given Turkey room to grow-and it’s not letting go.

Turkey at the center of global defense networks, with S-400 systems and drones above the Black Sea, connected to NATO, China, and the U.S.

Diplomacy on Two Fronts: West and East

Turkey doesn’t pick sides. It plays both. On one hand, Germany lifted its arms embargo in late 2024, allowing renewed defense cooperation. Turkish Airlines just signed a deal to buy up to 225 Boeing jets. Talks are open for F-16 upgrades and even a possible return to the F-35 program. The U.S. wants Turkey as a partner. But then there’s the S-400 problem. Turkey bought Russia’s air defense system in 2019. The U.S. kicked it out of the F-35 program. Sanctions under CAATSA are still in place. No resolution in sight.

Meanwhile, Turkey is building a third nuclear plant-with China. Talks are advanced. A second plant in Sinop is being planned with U.S. and South Korean partners. Energy isn’t just about power. It’s about independence. Turkey wants to be the bridge between Middle Eastern gas and European markets. That makes it valuable to everyone. Even the EU, which has blocked Turkey’s entry into its SAFE defense program, is quietly talking about energy cooperation. France, Greece, and Cyprus still resist. But Turkey doesn’t need their approval. It has its own defense industry, its own pipelines, and its own allies.

The Cost of Autonomy

Turkey’s balancing act isn’t free. Defense spending is eating into everything else. Renewable energy makes up nearly 20% of Turkey’s mix now-a sign of progress. But the country still needs more power. More pipelines. More ports. More infrastructure. And it’s funding all of this while trying to keep inflation under control and the lira stable. The economic pressure is real. The public is tired of austerity. The military-industrial complex is booming, but so are the costs.

And then there’s the political cost. Turkey approved Sweden’s NATO membership in 2024 after months of blocking it. That move was seen as a reset with Washington. But it didn’t fix the S-400 issue. It didn’t bring back the F-35s. It didn’t erase the distrust. Meanwhile, Turkey’s mediation in the Gaza ceasefire in October 2025 earned global attention-but also raised eyebrows in Europe. Was Turkey acting as a neutral broker? Or expanding its influence? The answer is both.

President Erdoğan balancing between NATO and China, with nuclear plants and drones below as economy crumbles beneath him.

What Comes Next?

Turkey’s future depends on one thing: whether it can keep delivering value without burning bridges. NATO needs its military muscle. The U.S. needs its airspace and ports. Russia needs its silence. Ukraine needs its neutrality. China needs its market. The EU needs its energy transit. Turkey is the only country that can satisfy all of them-at least for now.

But the tightrope gets narrower. If Turkey pushes too hard on its nuclear deals with China, Washington might pull back on defense sales. If it leans too far into NATO, Moscow might tighten the screws on the Black Sea. If it fails to meet the 5% spending target, allies will question its reliability. And if the economy collapses under the weight of defense spending, domestic unrest could force a policy shift.

Turkey isn’t trying to leave NATO. It’s trying to make NATO need it more than ever. And so far, it’s working. The question isn’t whether Turkey can keep balancing. It’s how long the rope will hold.

Key Players and Systems in Turkey’s 2025 Strategy

  • Montreux Convention - The 1936 treaty that gives Turkey control over the Bosporus and Dardanelles, allowing it to regulate military vessel passage.
  • S-400 missile system - Russian air defense system purchased by Turkey in 2019, triggering U.S. CAATSA sanctions and removal from the F-35 program.
  • Steel Dome air defense - Turkey’s indigenous missile defense system, developed to reduce reliance on foreign suppliers.
  • Bayraktar TB2 drones - Turkish-made combat drones used in Ukraine and Libya, now exported to over 20 countries.
  • Black Sea Grain Initiative - 2022 deal brokered by Turkey and the UN to allow Ukrainian grain exports, restored multiple times through 2025.
  • CAATSA sanctions - U.S. law imposing penalties on countries dealing with Russia’s defense sector; still active against Turkey in 2025.
  • NATO 5% GDP defense target - New alliance goal agreed at The Hague Summit in June 2025, requiring Turkey to raise defense spending to $66B+ annually.
  • Thrace nuclear plant - Proposed third nuclear power plant in Turkey, under negotiation with China as of late 2025.
  • Sinop nuclear plant - Second nuclear project planned on Turkey’s Black Sea coast, with U.S. and South Korean partners.

Why is Turkey spending so much on defense?

Turkey is increasing defense spending because NATO now requires members to spend 5% of GDP on defense by 2035. Turkey’s current spending is $46 billion in 2025, but it needs to hit over $66 billion to meet the target. This is driven by regional threats-from Russia’s presence in the Black Sea to instability in Syria and the Middle East. Turkey also wants to reduce dependence on foreign arms by building its own military tech, like drones and missile systems.

Is Turkey still part of NATO?

Yes, Turkey is a full and active member of NATO. It joined in 1952 and remains the alliance’s second-largest military power. Turkey participates in NATO missions, hosts key bases, and contributes significantly to Black Sea security. However, it often acts independently on issues like the S-400 purchase or relations with Russia, which creates friction but hasn’t led to expulsion.

Why does Turkey buy weapons from Russia?

Turkey bought the S-400 because the U.S. refused to sell it advanced air defense systems on acceptable terms. Turkey needed to protect its airspace and didn’t want to wait. The S-400 is one of the most capable systems in the world. Even though it led to U.S. sanctions and removal from the F-35 program, Turkey saw it as a strategic necessity. It’s also a signal to both the West and Russia: Turkey makes its own decisions.

Can Turkey join the EU’s defense program?

Not yet. France, Greece, and Cyprus have blocked Turkey’s inclusion in the EU’s new SAFE defense initiative due to longstanding political tensions, especially over Cyprus and migration. But Turkey is not waiting. It’s building its own defense industry and partnering with NATO and non-EU countries instead. The EU may eventually need Turkey’s military capabilities, but trust remains low.

What’s Turkey’s role in the Black Sea today?

Turkey is the most important security actor in the Black Sea. With Russia’s navy weakened by Ukrainian drone strikes, Turkey’s navy and air force now dominate maritime surveillance in the region. It controls access through the Bosporus under the Montreux Convention and acts as a mediator between Ukraine and Russia. Turkey doesn’t want war-it wants to be the indispensable gatekeeper, ensuring no outside power dominates the sea.

Is Turkey becoming more aligned with China?

In energy and infrastructure, yes. Turkey is negotiating with China to build a third nuclear plant in Thrace. It’s also deepening trade ties and seeking investment in ports and railways. But Turkey isn’t abandoning the West. It’s still buying jets from Boeing, negotiating F-16 upgrades with the U.S., and cooperating with NATO. This isn’t a pivot-it’s diversification. Turkey wants options, not alliances.

How did Turkey help in the Gaza ceasefire?

In October 2025, Turkey played a key role in facilitating the ceasefire framework brokered by former U.S. President Trump. Turkish diplomats acted as intermediaries between Israel, Hamas, and regional actors. Turkey has long positioned itself as a Muslim-majority nation with credibility in the Middle East. This role boosts its global standing and gives it leverage with the U.S. and EU-even as it continues to criticize Western policies in the region.

What happens if Turkey can’t meet NATO’s 5% spending target?

NATO doesn’t expel members for missing spending targets. But it does create distrust. Allies may question Turkey’s commitment, reduce joint operations, or limit intelligence sharing. Turkey knows this. That’s why it’s pushing hard-even if it means cutting education or healthcare funding. The goal isn’t just to meet the number. It’s to prove Turkey is indispensable, so even if it falls short, allies will still need it.