Kronstadt Hit Beside Putin’s Forum

Ukraine hit Russia's Kronstadt naval base twice in four days while Vladimir Putin was hosting investors 20 km away in St Petersburg. The corvette Boikiy burned in dry dock, oil terminals caught fire, and Kronstadt island was sealed off.

The timing matters. These were not strikes aimed at taking back ground. They were strikes wrapped around diplomacy, with Kyiv using military force to shape the terms of negotiation after Moscow rejected a peace offer.

Offer, rejection, strike

On 4 June, Volodymyr Zelenskyy published an open letter proposing face-to-face talks on neutral ground, a ceasefire during negotiations, and a prisoner exchange (Moscow Times). Putin rejected it the next day at SPIEF, Russia's answer to Davos, calling the letter "boorish" and saying he saw "no point" in meeting (New Indian Express, ISW).

Within 18 hours, Ukraine launched its second wave. Russia said it intercepted 144 drones over the Leningrad region alone (Fortune).

The Institute for the Study of War, a US conflict research centre, has documented Russia's own pattern of launching maximum-force strikes "immediately before and after prominent peace negotiations" (ISW). Ukraine is now turning that logic back on Moscow. Refusal carries a price. Zelenskyy described the strikes as "long-range sanctions."

The drone war spills into EU territory

Kronstadt is the clearest sign yet of Ukraine's expanding deep-strike reach. But the wider problem for Europe is that maritime drone warfare is no longer confined to the Black Sea.

On 7 May, Greek fishermen off Lefkada hauled in an armed Ukrainian maritime drone carrying an estimated 100-200 kg of explosives (CNN Greece, news247.gr). Athens filed a formal protest; Kyiv apologised and blamed wartime conditions (Greek MFA). Greece's defence minister called the scenario "terrifying."

According to Greece's Joint Chiefs of Staff, the drone was likely aimed at a Russian shadow-fleet vessel transiting the Mediterranean. That is the awkward edge of the new war at sea: a weapon built to hit Russian logistics can drift into EU waters and become someone else's emergency.

In the Baltic, Russia accused Lithuania, Latvia and Estonia of opening airspace to Ukrainian drones. All three rejected the claim as disinformation. Lithuania's foreign minister said Russia was deliberately redirecting drones into NATO airspace through GPS spoofing from Kaliningrad, where the number of detected spoofing transmitters rose from 3 to 36 in just over a year (Defense News).

Silent partners

The countries most deeply involved in drone co-production with Ukraine are saying very little about where those drones are used.

Poland, which signed new co-production agreements in May and is fielding six classes of tactical drones built partly on Ukrainian battlefield data, issued no public statement on Kronstadt (Money.pl). Lithuania signed a full drone deal with Kyiv on 13 May covering long-range strike, maritime and interceptor drones (President of Ukraine). It did not comment on the strikes either.

France, Germany and the UK confirmed a summit with Zelenskyy in London for today, 7 June, to establish a European negotiating track before Washington re-engages on its own terms (Eurointegration). Those leaders will sit across from a president who has just shown he can hit any naval base in European Russia.

Putin's response at SPIEF was more revealing than any retaliation. "Some of them break through," he told journalists. "We need to improve our air defences" (AP/Audacy).

That admission points to the mechanism. Ukraine's FP-1 drone, the platform credited with executing the Kronstadt strikes, uses AI terrain-matching navigation that bypasses GPS jamming entirely (Euromaidanpress, DroneSense). Russia's main electronic countermeasure no longer works against Ukraine's main deep-strike weapon.

Whether European co-produced components were present in the Kronstadt strike package remains unconfirmed. No one in Brussels, Berlin or Warsaw is asking publicly. The silence is the policy.