Bucharest Nine
Forum of nine NATO eastern-flank states bordering or closest to Russia; established 2015 to coordinate allied defence posture.
Bucharest Nine leaders met in Bucharest on 13 May 2026, as Russia fired 800 drones at Ukraine, and backed reinforcing NATO's eastern flank. Five months later drones sank two ships off Bulgaria, a member, and Sofia asked the Alliance for air defence.
Last refreshed: 18 October 2026 · Appears in 1 active topic
Can the Bucharest Nine protect Black Sea members as drones sink ships off Bulgaria?
Timeline for Bucharest Nine
Mentioned in: Drones sink HS Dignity off Bulgaria
Russia-Ukraine War 2026Issued joint statement reaffirming Ukraine's sovereignty and backing NATO eastern flank reinforcement
Russia-Ukraine War 2026: Zelenskyy proposes EU drone deals at Bucharest summitBackground
The Bucharest Nine (B9) is an informal grouping of nine NATO states on the Alliance's eastern flank: Romania, Poland, the Czech Republic, Slovakia, Hungary, Bulgaria, Estonia, Latvia and Lithuania. It was set up in Bucharest in November 2015, after Russia's annexation of Crimea, so that the members most exposed to Russian pressure could agree positions before wider alliance meetings. It meets at head-of-state level and issues joint statements, most recently in Bucharest on 13 May 2026.
The members do not move as one. In October 2026 drones sank the Alfa Watan in Bulgaria's exclusive economic zone on 6 October and the HS Dignity off Krapets on 12-13 October. On 16 October Bulgaria's defence minister, Dimitar Stoyanov, sought warplanes, air and drone defences and patrol flights from the Alliance. The request came from a government that had halted its own military aid to Kyiv in June and quit the Coalition of the Willing a month later.
Hungary, another member, lifted its objection to two new clusters of Ukraine's EU accession talks after Ukraine passed a minority-language schooling law on 12 October 2026.
The summit backed eastern-flank reinforcement
The B9 leaders met at Cotroceni Palace in Bucharest on 13 May 2026, joined by the Nordic allies, while a Russian barrage of 800 drones was tracked across 20 Ukrainian regions. Their joint statement reaffirmed Ukraine's sovereignty within its internationally recognised borders, backed security guarantees and called for reinforcement of NATO's eastern flank.
Zelenskyy used the forum to pitch a supply route that does not run through Washington. "I believe we all need bilateral drone deals," he said, proposing to pair European industrial capacity with Ukrainian battlefield testing, without US export approval for each sale. The pitch followed The White House freeze on Patriot exports, and it turned a consultative eastern-flank summit into a venue for building European weapons supply.
What is the Bucharest Nine?
Who are the members of the B9?
What happened at the Bucharest Nine summit in May 2026?
Why was the Bucharest Nine formed?
Why did Bulgaria ask NATO for air defence in October 2026?
Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Updated 18 October 2026. Editorial standards.