How Türkiye Came to the S-400: The Long Road to a Sky of Its Own

On 12 July 2019, Russian cargo planes started landing at Mürted air base outside Ankara. What they carried, the first parts of the S-400 air defence system, cost Türkiye its seat in an American fighter program and drew the first sanctions Washington ever aimed at a NATO ally.

It looked like a sudden lurch toward Moscow. The decision had actually been 16 years in the making, and it starts well before Russia shows up.

The long want

Türkiye spent a generation wanting an air defence it actually owned.

It sat under a sky it couldn't fully cover, and the hardware that turned up in a crisis belonged to other people. NATO allies sent Patriot batteries to the Syrian frontier in 2003, and again later in the decade, then took them home when the danger passed. Useful, but borrowed. And always missing the one thing Ankara kept asking for: the technology to build and run such a system itself.

So through the late 2000s it ran its own tender for a long-range system. Western and Eastern firms bid for years. The contest dragged, and underneath it sat one question. Could Türkiye buy a top-tier shield on terms that left it beholden to no one?

The Chinese detour

In September 2013 the answer came back: China.

Türkiye's procurement agency provisionally picked the Chinese firm CPMIEC and its FD-2000, about $3.4 billion, over American and European rivals. NATO was not pleased. The company sat under US sanctions, and its kit wouldn't plug into the alliance's shared early-warning network.

Two years of objections and stalled technology-transfer talks followed. In November 2015 Türkiye scrapped the whole process and said it would build its own system instead.

Hold onto that promise. The vacuum it left got filled from a direction nobody in Ankara had drawn up.

The pivot toward Moscow

Within days of the Chinese deal collapsing, on 24 November 2015, Turkish F-16s shot down a Russian Su-24 near the Syrian border for crossing into Turkish airspace.

Putin called it a stab in the back. Relations froze, trade, tourism, flights, all of it. Buying Russian missiles, right then, looked impossible.

Then the two capitals patched it up. In mid-2016 Erdoğan wrote to Putin expressing sorrow over the dead pilot, and by late June they were rebuilding ties.

Ankara's account is that the rupture had been engineered. In its reading, the FETÖ network steered the events that drove the two countries apart. The pilots who downed the jet were later charged with treason and membership of the network, charges Ankara links to the 15 July 2016 coup attempt it blames on the same group. (Former prime minister Ahmet Davutoğlu disputes that link, saying he was told the pilot had no connection. Worth keeping in.)

That coup was, in good part, an air-force operation. FETÖ officers seized tanks, helicopters, and F-16s; jets bombed the parliament in Ankara and screamed low over the capital.

Erdoğan was at a hotel in Marmaris. He left about 15 minutes before a FETÖ hit team stormed it, then flew to Istanbul with the cabin lights off and the plane kept off radar. Two coup F-16s locked onto the presidential jet in the air and never fired; one, by several accounts, had to break off to refuel.

So the same air force whose officers, in Ankara's telling, had downed the Russian jet eight months earlier now turned its planes on its own president. Courts later handed the putschist pilots some of the heaviest sentences in the country's history.

The sharpest test came on 19 December 2016. An off-duty police officer shot and killed Russia's ambassador, Andrei Karlov, at an Ankara art gallery. A court later ruled the gunman a covert FETÖ member and found the killing was meant to wreck the very reconciliation then under way. Five life sentences.

And the thaw held anyway. That's the strange part. A murdered ambassador usually ends a rapprochement; this one didn't, and the ground it left clear is what made an unlikely arms deal possible.

The decision

On 11 April 2017 Türkiye signed, roughly $2.5 billion for 2 batteries of the S-400, a date the Ministry of National Defence later confirmed in its own statement on the delivery.

Ankara called it a necessity. It had spent years trying to buy the American Patriot and kept getting refused on the terms it wanted, technology transfer and joint production above all.

And the complaint wasn't only Ankara's. Meeting Erdoğan at the G20 in Osaka in June 2019, Trump pinned the blame on his predecessor. They "wouldn't let him buy the missile he wanted to buy which is the Patriot," Trump said, calling a NATO ally that "was not treated fairly." By the time he said it, the Russian alternative had already landed.

The either-or framing was never quite true either. Even as the S-400 deal moved, Türkiye ran a parallel Western track, signing with the Italian-French consortium Eurosam in July 2017 to study co-producing the SAMP/T, then a letter of intent with France and Italy. Erdoğan kept saying he would take Patriots too, if the terms matched Russia's.

Delivery and the price

The first battery arrived between 12 and 25 July 2019. The second started moving to Mürted on 27 August.

The bill came fast. Within days of that first delivery, Washington threw Türkiye out of the F-35 program, where it was both a buyer and a parts supplier, on the argument that running the S-400 next to the jet would leak the plane's secrets. In December 2020 came CAATSA sanctions on the Presidency of Defence Industries and its leadership, the first time that law hit a NATO member.

Through all of it Ankara held one line. The S-400 would stand alone, Turkish officers would command it, and it would never be wired into NATO's network. The claim that it endangered the alliance, Turkish officials said, was overblown.

Where it stands now

Years on, it's calmer than the headlines and murkier than either side admits.

The S-400 sits in the Turkish inventory, tested. But it has never been openly declared fully operational or folded into day-to-day air defence. Ankara has also swatted away the idea of mothballing it "in boxes" to buy back an F-35 seat. Meanwhile it has been pressing Washington on F-16s to claw back the roughly $1.4 billion it sank into the F-35 before the expulsion.

Building its own

The longest shadow might be that 2015 promise to build its own.

It grew into the Steel Dome, a layered, home-built air defence network now taking shape under the Defence Industry Executive Committee.

At the top sits SİPER, Türkiye's first homegrown long-range system. The first version reaches past 100 kilometers out and 20 up; the second pushes that to 150 and 30, with vertical launch and a battery that can guide 20 missiles at once. Under it run the medium and short layers, Hisar and Korkut among them, stitched together by command software the developers say leans on AI. In 2025 Turkish firms signed about $6.5 billion in fresh contracts to grow the network, and SİPER passed its serial-production tests.

A sky of its own

Back to the apron at Mürted.

The S-400 answered an urgent need and carried a steep bill. The Steel Dome answers the older one running under this whole story, from the borrowed Patriots of 2003 to the scrapped tender of 2015: never again waiting on someone else's say-so for the air overhead.

Whether the Russian system was worth its price will get argued for years. The drive that produced it won't.

Timeline: the road to the S-400