In the early hours of a spring morning in April 2025, a wave of Ukrainian-built drones crossed hundreds of kilometers of Russian airspace and slammed into oil infrastructure in at least three regions, igniting fires that Russian emergency services scrambled to contain. Moscow’s Defense Ministry said it intercepted dozens of the incoming aircraft, but the blazes visible on social media and acknowledged by regional governors told a different story: some got through. Those strikes were not isolated. They were part of a sustained Ukrainian campaign that, over the past year, has turned domestically produced drones into one of the war’s most consequential weapons.
A submarine, a sea drone, and a shifted naval map
The most dramatic single operation linked to Ukraine’s drone push targeted a Russian Kilo-class submarine docked at the port of Novorossiysk on the Black Sea. Ukraine’s Security Service, the SBU, released footage in 2024 showing its “Sea Baby” unmanned surface vessel approaching and detonating against the hull of the vessel, which the agency said was left crippled.
Kilo-class boats are not prestige targets for their own sake. They are the platforms Russia has used to lob Kalibr cruise missiles at Ukrainian cities, power grids, and civilian infrastructure. Removing even one from service reduces the number of launch tubes available for those strikes.
Russia has not publicly confirmed or denied the extent of the damage, and no independent satellite analysis of the Novorossiysk berth has surfaced in open-source reporting. The SBU’s video confirms an attack took place, but the agency has every incentive to frame the outcome in the most favorable terms. What is independently documented, through British Ministry of Defence intelligence updates and open-source tracking groups, is that Russia’s Black Sea Fleet has pulled back from positions near western Crimea that it once held with confidence. That redeployment is itself a strategic concession, forced in large part by low-cost unmanned systems that cost a fraction of the warships they threaten.
At a demonstration attended by Associated Press journalists, the SBU showed an upgraded Sea Baby variant it says can reach any point in the Black Sea. If that range claim holds, it means Russia’s naval logistics, from supply runs to Crimea to tanker traffic, face persistent risk from a weapon Ukraine can build faster than Moscow can replace the ships it loses.
Striking at the money: Russia’s refining network under pressure
President Volodymyr Zelenskyy stated in early 2024 that Ukrainian long-range strikes had cut Russian oil refining capacity by 20 percent, with most of the deep strikes carried out by Ukrainian-made weapons rather than Western-supplied munitions. That figure has not been independently verified by an energy monitoring body, but it aligns with a pattern visible in commercial satellite imagery and industry data. The International Energy Agency noted disruptions to Russian refining throughput during 2024, and commodity-tracking firms such as Kpler recorded periods of reduced output at major facilities including refineries near Ryazan, Kstovo, and along the Black Sea coast.
By spring 2025, the strikes had not stopped. Russian regional governors continued to report drone attacks on energy infrastructure, and Moscow’s Defense Ministry acknowledged shooting down large numbers of incoming drones during multi-wave assaults. Even accepting Russia’s interception claims at face value, the sheer volume of attacks forces a painful tradeoff: every air defense battery assigned to protect a refinery in Krasnodar or a power station in Belgorod is one not available to shield ammunition depots, airfields, or troop concentrations closer to the front.
The strategic logic is straightforward. Russia funds its war effort in significant part through energy exports. Damaging the refining infrastructure that processes crude oil into exportable fuel products and military-grade diesel squeezes revenue and complicates logistics. Zelenskyy’s emphasis on Ukrainian-made weapons carrying out these strikes also signals something politically important: Kyiv can set its own targeting priorities for domestic systems without the restrictions that sometimes accompany Western-supplied arms like ATACMS missiles.
From ambitious target to industrial reality
In late 2023, Zelenskyy announced a goal of producing one million drones within a year. At the time, the number sounded aspirational. By late 2024, Ukrainian officials reported that the country’s defense sector, a patchwork of state enterprises, private startups, and volunteer-driven workshops, had produced over 1.5 million first-person-view (FPV) drones, surpassing the original target.
That figure, reported by Ukrainian defense officials and covered by Reuters, deserves some caveats. FPV drones used for close-range battlefield strikes are far simpler and cheaper than the long-range systems that hit refineries hundreds of kilometers inside Russia. Producing large quantities of small tactical drones does not automatically translate into equivalent numbers of strategic-range platforms. Still, the scale of output reflects a defense-industrial mobilization that has few modern parallels, built under active bombardment and supply-chain pressure.
Sustaining and expanding that production depends on continued access to electronics, motors, and specialized components, many of which Ukraine imports. Russia has targeted Ukrainian industrial sites, and Western sanctions on microchip exports to Russia have created a parallel scramble on the other side. Both nations are racing to secure the supply chains that keep their drone fleets flying, a competition that may ultimately matter as much as any single strike.
What the evidence supports and where gaps remain
The core facts of this campaign rest on solid ground. Ukrainian drones have repeatedly struck Russian naval assets, oil refineries, and energy infrastructure. The SBU has released primary-source video of at least one major naval attack. Zelenskyy has made on-the-record claims about the damage inflicted. Russian officials have acknowledged large-scale drone assaults and resulting fires. British and allied intelligence assessments have documented the Black Sea Fleet’s operational retreat.
Where confidence thins is on precise damage figures. The 20 percent refining-capacity reduction is a Ukrainian political claim, not an audited statistic. The Kilo-class submarine’s actual condition remains unconfirmed by neutral observers. Russia’s interception numbers are likely inflated, but by how much is unclear. And Ukraine’s drone production totals, while impressive if accurate, have not been independently audited.
For context, consider the incentives at play. Kyiv wants to demonstrate that homegrown innovation can offset gaps in Western military aid, a message aimed at both domestic audiences and foreign capitals weighing future support. Moscow wants to reassure its public that critical infrastructure is defended and that Ukrainian attacks are being neutralized. Where both sides’ accounts converge, such as the occurrence of large-scale strikes and fires at energy sites, the underlying facts are most reliable.
Why this campaign keeps escalating
As of May 2025, the drone war shows no sign of plateauing. Ukraine continues to expand its arsenal of both tactical and strategic unmanned systems. Russia continues to absorb strikes while investing in electronic warfare, layered air defenses, and its own drone programs. The asymmetry that makes this campaign so potent, cheap drones versus expensive infrastructure, also makes it difficult to stop. A Sea Baby drone costs a tiny fraction of the submarine it targets. An FPV quadcopter that destroys a fuel truck costs less than the truck’s cargo.
Independent verification will be essential in the months ahead. Commercial satellite imagery, open-source intelligence analysts, and energy-market data can all help separate confirmed damage from wartime claims. What is already clear is that Ukraine’s drone program has evolved from a scrappy improvisation into a central pillar of its war strategy, one that is forcing Russia to defend a vast territory against threats it cannot easily counter.
More from Morning Overview
*This article was researched with the help of AI, with human editors creating the final content.
