Ukraine recaptures around 125 sq km near Lyman in Operation Vivaldi

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Ukraine claims it has recently regained about 125 sq. km. of territory near the town of Lyman in the eastern Donetsk region during what has been dubbed Operation Vivaldi. Rodion Kudryashov, a Ukrainian colonel and deputy commander of the Third Army Corps, offered some insights into this offensive and what made it different.

Though the operation is still ongoing, the success of Vivaldi began long before any troop movements, Kudryashov explained in an editorial he published in Ukrainian Pravda .

Ukraine is making advances near the town of Lyman, located in the Donetsk region. (Google Earth)

“After the Third Army Corps was formed, we changed the command system of its subordinate units,” he noted. “Some brigades came to the corps after very heavy fighting, with losses, manning problems and, most importantly, eroded trust in their leadership.”

Third Army Corps Commander Brig. Gen. Andriy Biletsky “then set out one of our key principles: a commander must be responsible for the entire cycle, from training a soldier to the result on the battlefield,” Kudryashov pointed out. “In some places that meant replacing a commander. In others it meant restructuring a staff or strengthening the NCO chain. In some cases we had to build, almost from scratch, processes that on paper should have been working long ago.”

At issue was changing the culture from a more rigid Soviet-era model, with a cumbersome chain of command, to a modern, more flexible one better suited for the current conflict.

“A modern commander has to handle an enormous flow of information and make decisions quickly,” the deputy commander proffered. “He has to understand what unmanned systems, logistics, reconnaissance and adjacent units can do, while not smothering initiative at lower levels with endless approvals. An army where every decision takes hours to travel up and down the chain loses to an army that makes the same trip in minutes.”

Once those changes were put in place, the Third Army Corps had to first stop Russian advances in the sector before it could move forward.

VIVALDI

GoPro footage from Ukrainian assault troops who took part in the Vivaldi counteroffensive, which resulted in the liberation of five settlements in the Lyman direction. pic.twitter.com/2SVXSKlEX0

— 𝔗𝔥𝔢 𝕯𝔢𝔞𝔡 𝕯𝔦𝔰𝔱𝔯𝔦𝔠𝔱 (@TheDeadDistrict) September 17, 2026

“When the corps took over its area of responsibility, our first task was not an offensive,” the officer said. “We had to stop the situation from deteriorating and stabilize the forward edge.”

“The enemy was pressing. In some sectors our combat formations were losing cohesion,” he underscored. “The Russians were actively using infiltration tactics: small groups seeped between positions, massed in our rear, threatened logistics and gradually eroded the defensive line.”

“We had to stabilize the forward edge and stop the infiltration,” Kudryashov said. “We had to rebuild command, put in commanders capable of making decisions, form new teams and reconstitute units. We had to set up the surveillance-and-strike system and sustain the front line. We had to stockpile ammunition, drones and other resources, understand the enemy, and plan the next step before the previous one was finished. Only after that could we move forward.”

By June, the corps was able to secure the front “in the sector from Borova to Lyman and eliminate the enemy’s infiltration zones,” Kudryashov continued. “That sounds less impressive than the word ‘offensive,’ but no offensive ever happens without it.”

“You cannot plan a complex operation if you don’t know where your forward edge will be tomorrow,” the deputy commander extrapolated. “You cannot build up forces if your logistics are constantly under threat. And you cannot form a strike group if your units are always forced to patch new breaches. So the first phase of ‘Vivaldi’ was not an advance at all. It was creating the conditions that made an advance possible in the first place.”

Once the front was stabilized, the next step was shaping the battlefield for the offensive. The corps’ unmanned systems units went to work against Russian logistics, striking a pipeline and depots. That forced the enemy to change its fuel and lubricant supply routes.

Ukraine’s 3rd Army Corps released new footage of search-and-strike operations on the Lyman front. FPV drone operators from the 60th Mechanized Brigade’s FATUM unit targeted Russian armored vehicles, a Grad multiple rocket launcher and personnel. #Ukraine pic.twitter.com/1iNG7z2N1c

— NOELREPORTS (@NOELreports) September 24, 2026

“The operation also involved the corps’ brigades, its reconnaissance and unmanned units, and attached forces from the SSO (Special Operations Forces), GUR (Defense Intelligence) and DPSU (State Border Guard Service),” the deputy commander said. “To counter infiltration, a joint headquarters was set up to coordinate special and reconnaissance units at the tactical level under a single concept.”

“In my view, this is one of the main characteristics of modern war,” he further stated. “It is not 10 strong units that each fight well on their own. It is 10 different elements that start working as one system at the right moment.”

An interesting new detail from Ukraine’s 3rd Army Corps about Operation Vivaldi on the Lyman axis.

The Corps says Ukrainian forces carried out a flanking maneuver and, for the first time, airlifted unmanned ground vehicles behind Russian lines, while also suppressing Russian… https://t.co/ZEq8C75bN4 pic.twitter.com/KgKcZ0Zs2P

— Special Kherson Cat (@bayraktar_1love) September 20, 2026

The influential, Kremlin-connected Rybar Telegram channel has acknowledged Ukrainian gains in this sector.

“In the first half of summer, Russian units gradually advanced in Lyman,” Rybar wrote this morning . “However, in August, the enemy launched counterattacks and, by the first week of September, regained some positions, and also began attempts to recapture Shandryholovo and Zarechnoye.”

“The enemy did not inflict significant losses on Russian troops, as the concentration of units of the West group of forces in the salient remained relatively low,” Rybar added. “However, later, the UAF deployed reserves to launch an offensive towards Zherebets in order to align the front along the water barrier and return it to the configuration of the end of 2025.”

rybar now saying the 144th division is still falling back. the 3rd corps is still advancing and destroying an entire army group as they move. this is historic. pic.twitter.com/2jOa8KR9oA

— david D. (@secretsqrl123) September 22, 2026

Though the battle is still in flux, Kudryashov said there are lessons the rest of the Ukrainian military should heed.

“Winning one battle is not yet winning the war,” he said. “The enemy is learning too. He changes tactics, looks for weak spots and tries to scale what works for him.”

“So our task is to be faster, not only in physically moving forward but also in our ability to see, think, decide and put into practice what delivers results,” the deputy commander avowed. “And to do everything possible so that our soldiers pay the lowest possible price for every next kilometer of Ukrainian land.”

The Latest

On the battlefield, in addition to the gains Ukraine has made near Lyman, it has also largely been able to hold off Russian advances across the front lines. Here are some key takeaways from the latest Institute for the Study of War assessment of frontline operations :

Sumy: Russian forces recently conducted an infiltration mission east of Sumy City, and they continue to conduct glide bomb strikes against frontline settlements in northern Sumy Oblast to set conditions for future offensives.

Kharkiv: Russian forces continued offensive operations in northern Kharkiv Oblast and in the Borova, Kupyansk and Velykyi Burluk directions on Sept. 21 and 22 but did not advance.

Donetsk: Ukrainian forces reportedly continue counterattacks in the Lyman direction, including southeast of Lyman, as Russian forces are attempting to use redeployments to stabilize the area. Russian forces continued offensive operations east and southeast of Slovyansk near Rai-Oleksandrivka and toward Mykolaivka and Fedorivka Druha on Sept. 21 and 22 but did not advance. During this period, they also tried to advance in the Novopavlivka and Oleksandrivka directions but made no gains, as Ukrainian forces counterattacked in both areas.

Zaporizhia: Ukrainian forces recently advanced or maintained positions in western Zaporizhia Oblast.

Kherson: Neither Russian nor Ukrainian forces reported ground activity in the Kherson direction on September 22.

Russian Offensive Campaign Assessment, September 22, 2026: The Russian Ministry of Defense (MoD) falsely claimed that Russian forces have encircled Dobropillya — an intensification of the Kremlin’s cognitive warfare campaign alleging encirclements across various sectors of the… pic.twitter.com/yMoAcyVIme

— Institute for the Study of War (@TheStudyofWar) September 23, 2026

In his speech to the U.N. General Assembly this afternoon , Ukrainian President Volodymyr Zelensky called for Russia to end its war and said it was paying a heavy price — and exacting a terrible toll — for little territorial gain.

“This ridiculous and never-ending war with Ukraine must be ended,” the Ukrainian leader urged. “I do not know a single world leader who would say otherwise. I do not know anyone who is openly for this war, except one man.”

He was referring to Russian President Vladimir Putin.

“Ladies and gentlemen, for almost five years now, Russian generals have been trying to carry out Putin’s crazy order to seize our eastern land, the Donetsk region,” Zelensky continued. “And just this year, from January through August, the Russian army lost 248,964 people on the battlefield in Ukraine in eight months. Twenty-one countries in the world have smaller populations… than the number of Russian troops lost in just eight months.”

“It’s madness, but they still keep going there to die because that is what Putin wants,” Zelensky suggested. “After losing so many people, Russia managed to capture just over 1,000 square kilometers of our land this year, and we have already liberated a significant part of it. Russia is a country that already has 17 million square kilometers of its own land without any Ukrainian territory, by the way. So to add another 1,000 square kilometers, Putin is paying with 248 people for every kilometer. Does anyone still think that he is reasonable? And moderate?”

“Russia’s leader, Patient Zero, the man from whom this war began and spread into the world, becoming the largest war in Europe since World War II, will inevitably leave this war,” Zelensky proffered. “But the longer Putin is able to wage war, the more evil he will leave behind in this world. Today, nothing in war works the same way it did, by the way, in 2022, except the courage of people.”

Russian missile and drone barrages have “caused damage, but they didn’t break us,” the president proclaimed. “We build our defense. What is really difficult for us now is Russian ballistic missiles and their new jet-powered Shaheds — Iranian technologies.”

Residential buildings stand against the backdrop of smoke from a Russian attack on Kyiv. (Photo by Bohdan Diev/Global Images Ukraine via Getty Images) Tatyana Kudel’s’ka

“Just imagine this: since the beginning of this year, Russia has already used more than 2,100 missiles of different types again against us, against Ukraine, our people and our children,” Zelensky stated. “More than 950 of them were ballistic missiles . In eight months of this year, Russia used 63,000 attack drones of different types against Ukraine, our people, and more than 7,700 of them were jet-powered Shaheds , truly destructive and very dangerous weapons. Just think about it. The Russians launch jet-powered Shaheds every hour, every hour, against our cities , our economy, our infrastructure. Our combat aircraft are fighting them 24/7, and this is part of Russia’s strategy to create a new threat every hour, to make life harder for the economy and to disrupt people’s lives, and to stop children from being able to study, to study at school.”

Speaking at the Sixth Summit of the International Crimea Platform in New York on Wednesday, Zelensky said the return of Crimea is a condition for any return to normal relations with Russia.

“Disrespect for international law began in 2014, when Russia entered Crimea,” the Ukrainian leader stated. “There can be no full return to normality without Crimea, the restoration of security, the protection of people and lives, the release of prisoners held by Russia, and a return to the fundamental principles of international law. Territorial integrity matters, state sovereignty matters, and human lives matter. And Russia must learn this.”

Tuesday, Zelensky met with U.S. President Donald Trump.

Among the topics of their three-hour meeting were a path to end the war and a renewed discussion about the licensing of Patriot air defense interceptors so they can be built in Ukraine. The country is struggling to defend against Russian ballistic missiles because of the dearth of these munitions.

“Just had a positive and productive meeting with President Trump on the sidelines of the UN General Assembly,” the Ukrainian leader stated on X. “Both the United States and Ukraine want this senseless Russian war to end before winter. We discussed possible de-escalation steps that could pave the way to diplomacy.”

“I am grateful that, in parallel with this, our teams continue to work on launching the production of Patriot interceptor missiles in Ukraine,” Zelensky noted. “This is exactly what will help protect lives if Russia rejects negotiations and continues to rely on ballistic terror against our people this winter and beyond. We also discussed other bilateral and multilateral issues, including the winter air defense package for Ukraine. Thank you to President Trump, his team, and all the American people for their support.”

I just had a positive and productive meeting with President Trump @POTUS at UNGA. Both the U.S. and Ukraine want to see this senseless Russian war ended before winter. We discussed potential de-escalatory steps that can open up the way to diplomacy. I am grateful that in the… pic.twitter.com/Ayvsj9It3m

— Volodymyr Zelenskyy / Володимир Зеленський (@ZelenskyyUa) September 22, 2026

For his part, Trump said negotiations about Patriots are ongoing but offered no commitments.

“We’re talking about that,” Trump stated. “We’ll be talking about that now. If you would have come in at the end, we would have had an answer. But we’ll be talking about that. I mean, we talk about it all the time. Very capable people, really amazingly capable people.”

This isn’t the first time the two leaders have talked about a Patriot licensing deal. The issue came up back in July. As we noted at the time, such a deal faces big challenges.

First of all, it could face bureaucratic and regulatory hurdles, like getting congressional approval. Major security concerns not just having license production of a very sensitive weapon in Ukraine, but also having to do with whatever facility will perform the work, which would become a top target for Russia. Even if they got the clearance to move forward, delivery of new weapons will still take years due to the time it takes to build the facility and to source long-lead components.

Even Lockheed Martin, one of the world’s biggest arms makers, currently produces only about 650 PAC-3 MSE interceptors a year, or just shy of two per day. However, under a contract with the Pentagon inked in January , Lockheed is committed to boosting Patriot PAC-3 MSE annual production to 2,000 in the years to come.

You can read more about the headwinds a Patriot licensing deal would face, even if it were to come to fruition, in our initial story here .

A Patriot interceptor. (DOW) Department of Defense

Ukraine’s president also confirmed that “Kyiv is ready to agree to an energy truce on the condition that Russia does not attack its energy, electricity and heating infrastructure as well as its water supplies,” CNBC reported . “Trump has previously called on Ukraine to stop targeting Russian oil refineries with drone strikes, which he says are ‘hurting the world’ as fuel supply disruptions from the Ukraine and Iran wars propel U.S. diesel prices to a record high .”

Ukraine’s repeated attacks on Russian oil infrastructure is having a major impact.

“Russian refinery throughput fell to 3.8 mb/d, its lowest level in more than 20 years and roughly 30% below a year earlier,” according to a recent report by the International Energy Agency (IAE). “Reported gasoline output is down by 20% compared with 2025 levels, while diesel production is estimated to have fallen by nearly 30%, prompting the government to restrict fuel exports to protect domestic supplies.”

Amid the U.N. General Assembly meeting, strikes by both sides continued.

“At least 16 people were killed and 59 others injured in Russian attacks across Ukraine over the past day, as Russia launched several waves of ballistic missiles at Kyiv overnight,” the Kyiv Independent reported , citing local authorities.

“Two people were killed and eight others injured in Kyiv, where Russian ballistic missiles struck the capital in three waves overnight,” the publication added. “Residential buildings, a maternity hospital, energy, and logistics infrastructure were among the sites damaged, according to President Volodymyr Zelensky.”

“Russia launched 282 attack drones of various types overnight, including jet-powered drones, as well as Zircon anti-ship missiles and Iskander-M, S-400, and KN-23 ballistic missiles,” the news outlet stated, citing the Ukrainian Air Force . “Ukrainian air defenses shot down 227 aerial targets, including 219 drones, four Zircon missiles, three ballistic missiles, and one Banderol munition. Strikes were recorded at 13 locations, while debris from downed targets fell at 10 locations.”

A difficult night for Ukraine as Russia continued attacking our civilians, launching a ballistic missile attack on Kyiv, and attacking Kyiv and other Ukrainian regions with drones.

The air raid alert in Kyiv was turned on at 3:28 a.m. and hasn't turned off since.

In Kyiv, two… https://t.co/l1Vr7AMH5o pic.twitter.com/giT5FjWq80

— Anton Gerashchenko (@Gerashchenko_en) September 24, 2026

Ukraine’s strikes on Russian energy infrastructure continued.

“Over the past 24 hours, two oil refineries were hit – one in Bashkortostan and one in the Samara region. There were also strikes in the Black Sea,” the Ukrainian Defense Ministry stated on X. “We are taking the war back to where it came from. We are bringing peace closer for Ukraine. I thank the units involved for their precision.”

I thank our warriors for the results they achieve every day in carrying out Ukraine’s long-range sanctions. Over the past 24 hours, two oil refineries were hit – one in Bashkortostan and one in the Samara region. There were also strikes in the Black Sea.

We are taking the war… pic.twitter.com/x8LGqvsJ0e

— Defense of Ukraine (@DefenceU) September 22, 2026

In an effort to defend against Ukrainian attacks, Russia continues to use netting to protect its energy facilities. You can see a recent example in the video below.

After more frequent Ukrainian strikes on Russian oil refineries and fuel depots, Moscow and the Moscow region decided to cover potential targets with anti-drone nets.

This is the reality Putin has brought Russia to. pic.twitter.com/G4QZyTL22c

— Visegrád 24 (@visegrad24) September 23, 2026

Finland’s President Alexander Stubb and Zelensky this morning “signed an Agreement on Enhanced Defense and Security Cooperation under the Drone Deal format,” the Finnish Defense Ministry said in a statement. “It will enable defense materiel cooperation between the two countries.”

“The agreement will enable Finland and Ukraine to transfer technology and knowledge, pursue research, development and innovation cooperation and promote joint manufacturing and drone technology development between their industries,” the MoD stated. “Another objective is to simplify administrative processes, for example regarding the granting of export authorizations, to make the transfer of defense materiel and technologies between the two countries as efficient as possible.”

Finland and Ukraine take their defence cooperation to the next level

Today, we signed a drone deal with @ZelenskyyUa . The agreement enables, among other things, the joint production of defence materiel. Defence sector companies in Finland are ready, and the joint effort can now… pic.twitter.com/UUh2kZPPpk

— Alexander Stubb (@alexstubb) September 23, 2026

With electronic warfare interfering with how drones controlled by radio frequencies operate, Ukraine is testing a new system of small radio beacons placed on the ground that allow drones to navigate without GNSS — including missions deep inside Russia. While many systems might not be need this fix, some of the lower-end drones might.

Ukraine is testing and scaling this technology as part of a layered navigation system designed to keep drones autonomous in heavily jammed environments.

“The concept is quite simple,” the BBC wrote . “If the enemy jams the signal coming from above—specifically from GNSS (Global Navigation Satellite System) satellites, which determine the precise coordinates, speed, and time of any object on Earth—then specific points must be created to provide that same signal from below.”

The idea is to guide the drones by triangulating their location.

“To achieve this, special small devices—radio beacons—are either installed on the ground or air-dropped across a specific area. Their coordinates are known; thus, when a drone flies through the area, it receives coordinate data and signal transmission timing from several beacons. From there, it is a matter of basic geometry: the UAV calculates its own spatial position using data on the distance to the beacon and its altitude above the ground.”

GPS can be jammed. Ukrainian drones still need to fly.

A new beacon network is helping solve that problem.

Small radio beacons placed on the ground allow drones to navigate without GNSS or a constant communications link — including missions deep inside russia.

Ukraine is now…

— 7th Corps of AAF (@7corpsDSHV) September 23, 2026

In the age of robots, uncrewed ground vehicles (UGVs) are playing a larger role in combat . The following video shows one UGV rescuing another one by pushing it back on its wheels.

A Ukrainian logistics UGV comes to the rescue of its overturned teammate, helping get the stranded ground robot back on its wheels. pic.twitter.com/q7d5I2tyOe

— Special Kherson Cat (@bayraktar_1love) September 23, 2026

That’s it for now.

Contact the author: howard@twz.com

The post Inside Ukraine’s Operation Vivaldi That Sees It Troops Gaining Ground In The East appeared first on TWZ .