The New Numbers

On May 21, Ukrainian drones struck the Rosneft-owned Syzran oil refinery in Russia's Samara region — more than 800 kilometers from Ukraine's border, according to President Volodymyr Zelenskyy on Telegram.

The Straits Times reported that the refinery processes 7 to 8.9 million tons of crude oil annually. Ukrainian drone forces commander Robert Brovdi confirmed it was the 11th Russian oil refinery hit in May alone.

Two civilians were killed in the Syzran attack, according to the local Russian governor. Ukraine also separately struck the Ryazan oil refinery, per The Guardian's reporting on the same strike wave.

Why Ukraine Is Doing This Now

According to ABC News, U.S. President Donald Trump's war in Iran has driven up global oil prices — which means Russia is earning more per barrel. Ukraine's response: destroy the infrastructure that turns that crude into cash.

Ukraine has specifically escalated attacks on Baltic Sea ports — particularly Ust-Luga and Primorsk — which Russia uses to load oil exports. During one May attack on Primorsk, more than 60 Ukrainian drones were shot down, according to Leningrad region governor Alexander Drozdenko, per ABC News.

Ukraine is trying to strangle Russia's war chest at the source.

The Problem: Drones Are Landing in NATO Countries

As Ukrainian drones snake north toward Baltic ports, some are going off course — and crashing inside NATO member states.

According to ABC News, Ukrainian drones have:

• Crashed into a power plant chimney in Estonia
• Hit empty fuel tanks in Latvia
• Been shot down by Romanian fighter jets based in Lithuania over southern Estonia on May 19

On May 7, after stray Ukrainian drones entered Latvian airspace, Latvian Defense Minister Andris Spruds and Prime Minister Evika Silina both resigned. The drones literally collapsed a NATO government.

Estonian Defense Minister Hanno Pevkur told Ukraine directly to send its drones "as far from NATO territory as possible."

Ukraine's explanation: Russian electronic jamming and GPS spoofing is sending their drones off course. Ukrainian officials apologized and said the drones were aimed at legitimate military targets inside Russia.

Russia has been aggressively jamming GPS across the Baltic region for years. But the violations raise tensions with allied nations when drones crash in their territory.

Russia Hit Ukraine With the Biggest Barrage Yet

According to BBC reporting, Russia launched more than 1,500 drones and 56 missiles at Ukraine within a 48-hour window — the largest sustained aerial assault since the 2022 invasion began.

A Kh-101 cruise missile struck a nine-story apartment block in Kyiv's Darnytskyi district on Thursday, killing 24 civilians including three children, according to The Guardian. Among the dead: 12-year-old Liubava and her 17-year-old sister Vira — whose father had already died fighting on the front line. Their mother is the sole family survivor.

Ukraine declared a national day of mourning.

Ukraine's Air Defenses Are Improving Fast

During the massive Russian barrage, Ukraine intercepted 94% of long-range drones and 73% of missiles. Compare that to May 14, when Ukraine only downed 55% of Russian drones nationwide.

That's a significant jump in intercept rates in days.

Lt. Col. Yuriy Myronenko, inspector general at Ukraine's Ministry of Defence, told BBC: "We are now, unfortunately, the best in the world" at drone defense. He acknowledged ballistic missiles are still a different, harder problem.

Ukraine is now producing cheap interceptor drones at scale specifically designed to bring down Russian Shaheds. According to BBC, the P1-SUN interceptor reaches speeds of more than 300 km/h (186 mph).

What Mainstream Coverage Is Getting Wrong

Most outlets are covering the drone war as either a Ukrainian heroism story or a Russian atrocity story. The emerging strategic reality involves both elements, but other dimensions deserve more attention.

The NATO airspace violations are being dramatically underplayed. A Latvian government fell over this. A Romanian jet based in Lithuania shot down a Ukrainian drone over Estonia. These are Article 5-adjacent incidents — situations where a miscalculation could trigger obligations no one wants triggered.

The Iran war connection also remains largely absent from coverage. Trump's military action against Iran spiked oil prices — which handed Russia a revenue windfall — which is directly accelerating Ukraine's refinery campaign. That chain of events has consequential implications for the regional conflict.

Bottom Line

Ukraine is waging an increasingly effective drone war against Russian energy infrastructure. Eleven refineries in one month represents a systematic campaign to defund Putin's military machine.

But the same drone program is now creating incidents inside NATO territory that are destabilizing allied governments and forcing NATO jets to shoot down Ukrainian hardware.

Ukraine cannot afford to slow down. NATO cannot afford to keep ignoring the violations. The tension between these realities will define the next phase of the conflict.