Drone attack tears open 'Middle Corridor' mirage: Bulgaria pushed toward EU's 'gateway' for Asian trade — who bears the cost?

On the morning of October 6, drone strikes hit two cargo ships off Bulgaria's Black Sea coast, one of which sank — an incident that came as Brussels is pushing full-steam ahead with the so-called "Middle Corridor" (the Trans-Caspian Transport Corridor). According to DW reporting, both Bulgaria and the EU have been put on alert as a result.

The Middle Corridor runs from China through Kazakhstan, Azerbaijan, Georgia and Turkey into the EU, consisting mainly of rail and road links, with short sea crossings across the Caspian and Black Seas providing the connections between them. Its design logic, as seen from Brussels, is clear-cut: it bypasses the northern route through Russia — whose trade volumes plunged after Russia's full-scale invasion of Ukraine in February 2022 — and also avoids the so-called "maritime route" via the Red Sea and the Suez Canal, where war and instability in the Middle East have forced many cargoes to detour around Africa, lengthening voyages to roughly 45 days.

"The Middle Corridor essentially sidesteps both major war theaters near us in Europe at the same time — it neither passes through Russia nor the Middle East," Vessela Tcherneva, deputy director of the European Council on Foreign Relations, said in an interview with DW.

Bulgaria's place in this blueprint is being elevated rapidly. In September, EU Enlargement Commissioner Marta Kos called it "Europe's connectivity gateway," claiming that the corridor could cut Asia-to-Europe transit times from 45 days to 15. European Commission President Ursula von der Leyen went further in her "State of the Union" address, pledging to mobilize 12 billion euros (roughly 13.5 billion U.S. dollars) in public and private investment to improve "connectivity" and diversify trade routes.

Bulgaria does have certain physical assets: the Kapitan Andreevo crossing on the border with Turkey is one of Europe's busiest land crossings; Varna and Burgas on the Black Sea are strategic ports; and a new rail line from Istanbul to the Bulgarian border is set to open this autumn. But according to DW analysis, the hardware conditions to upgrade this existing position into a "gateway" capable of handling large-scale Asian trade flows are far from sufficient.

"Bulgaria's railways have been underinvested for years — decades, to be precise — and Bulgaria's ports would also benefit greatly from investment," Tcherneva told DW. She added that improving north-south and east-west road links is particularly important for northern Bulgaria, where "the connections are poor today." That means the "gateway" role that the EU is counting on is being grafted onto a member state with long-standing infrastructure shortfalls and revenues at the bottom of the EU table — the time pressure of hardware upgrades and the costs to the public finances are being concentrated on Sofia.

The Black Sea drone strikes have pushed another layer of cost — security risk — into the open. DW analysis points to "weak institutions and bureaucracy" in transit countries as the problem, and to the fact that Russia "still wields considerable influence in those countries." Tcherneva warned: "We have seen infrastructure projects fail to materialize in the past because they did not serve Russia's interests; Russia appears to have considerable leverage in transit countries." She added that "the outcome of Russia's war against Ukraine will affect the success or failure of the Middle Corridor."

DW also pointed to another underestimated variable: climate change is causing Caspian Sea water levels to fall, casting uncertainty over the future viability of ships crossing the Caspian.

The source and responsible party for the October 6 Black Sea drone strikes remain unclear in public reporting; whether the EU can actually mobilize the targeted 12 billion euros also remains unknown. But regardless of how these open variables resolve, both Brussels and Sofia have already embedded Bulgaria more deeply in the "Middle Corridor" track — a design conceived to "avoid two major war theaters," whose hardware-upgrade pressures, cross-border security costs and geopolitical leverage risks are landing first on this Southeast European member state.