For 2 Days In A Row, Russia Attacked Chasiv Yar (Again), And Were Beaten Back

Chasiv Yar, again? Yes, the Russians are again attacking Ukrainian positions at Chasiv Yar because it is on the way to Ukraine's fortress belt cities further west. 

But the Russians are being beaten back - as they have been elsewhere along the front - by a combination of Ukraine's drones, artillery and infantry. JL

David Axe reports in Trench Art:

Two days in a row, the Russian 70th Motor Rifle Division attacked Ukrainian positions at Chasiv Yar. Two days in a row, the Ukrainian 24th Mechanized Brigade fought back with drones, artillery and infantry. Ukrainian defenders destroyed enemy armored vehicles, transport, and troops even at the approaches to the positions. A similar breakthrough attempt was made by the Russians on April 18. They involved five armored combat vehicles, a tank, as well as motorcycles and ATVs for rapid advancement. However, thanks to the coordinated work of intelligence, drones, artillery, and infantry, the attack was thwarted. The Russians are trying to act in waves, combining equipment and light mobile groups, but is suffering huge losses.

New Ukraine-UK AI Hub Uses Battle Data To Predict, Disrupt Russian Moves

Ukraine, in partnership with the UK, has created an AI war center, which is designed to predict, identify and disrupt Russian tactics and movements. 

The concept is to use Ukraine's vast store of battlefield data to anticipate and then shape Russian options so that Ukraine has an ability to force them to make decisions which give Ukraine the advantage. This will not surprise corporate users of AI, whose marketing or financial strategies may be similarly created, but this will be a first war-time application. The intention is to optimize opportunities and reduce casualties while never letting the Russians have a moment's peace. JL

Olena Mukhina reports:

Ukraine, backed by the UK, is launching a Defense AI Center. At the core of the concept is that in modern conflict, decisive advantage is determined not by the volume of resources, but by the speed of decision-making. Accordingly, “A1” is focused on the practical battlefield application of AI technologies. Processing large-scale battlefield data, the objective is to transform raw information into actionable intelligence: forecasting enemy behavior, modeling possible scenarios, and generating response options. A second priority is the development of autonomous  drones and ground robotic systems which operate without GPS access and under conditions of intense electronic warfare while maintaining functionality

Russian Intel Being Shaped By Ukraine's Degrading of EW, Targeting Ability

Like watching two computers playing chess against each other, Ukraine and Russia have been using their technological capabilities to gain battlefield advantage. But the one evidently emerging with an advantage is Ukraine. 

Ukraine's systematic targeting of Russian radar, air defense and other electronic warfare assets is now giving it the ability to force the Russians to make choices which are more beneficial to the Ukrainians. This has been accomplished by the early interdiction of logistics, troop movements and other operations that are slowing Russia's ability to plan. JL

Mick Ryan reports in Futura Doctrina

The operational picture displays a slowdown in Russian gains. Russian forces captured just 133 square kilometres in March 2026 — the lowest monthly total since June 2024. The latest figures suggest deeper Ukrainian drone operations, increased attacks on the Russians, improved defensive preparations, and the diversion of Russian military attention to southern Ukraine is imposing costs on Russia’s spring offensive tempo. On the Kharkiv axis, Ukrainian forces continued their mid-range campaign against Russian radar systems. This was part of the Ukrainian campaign to degrade Russian early warning and targeting capabilities. This reflects a maturation of Ukrainian operations. Ukraine is shaping the sensor and intelligence architecture that supports Russian air defence, artillery and aviation.

Russian Refineries Struck, Burned By Ukraine After US Lifts Oil Sanctions

Immediately after the US again relaxed oil sanctions on Russia, a massive Ukrainian drone attack struck several Russian oil refineries from the Black Sea to the Baltic Sea, damaging them and leaving some still burning. The US government is desperate to reduce rising gas prices as its war on Iran continues despite repeatedly failed ceasefires. 

Ukraine now has the capacity to do this without US help or permission as it is developing more of its own weapons. It has been clear that it will no longer quietly accept actions which hurt Ukraine. JL

Ivana Kottasova reports in CNN:

Ukraine  attacked two Russian refineries and other key oil targets overnight Saturday, just hours after the US granted Moscow another waiver on the sale of its sanctioned oil. Kyiv’s ‌drone forces commander Robert “Madyar” Brovdi said Ukraine had struck the Novokuybyshevsk and Syzran oil refineries in Russia’s Samara region, the Tikhoretsk oil terminal in the Krasnodar region, and the Baltic Sea port of Vysotsk, as well as an oil depot in Sevastopol, in occupied Crimea. The Krasnodar region Emergency Response Headquarters said a fire had broken out at the oil depot in Tikhoretsk, and were trying to bring it under control. The governor of the Leningrad region where the Vysotsk port is located, said a drone attack had caused a fire at the port

Ukraine Wiped Out the Logistics of Rubicon, Russia's Most Effective Drone Unit

Ukrainian special forces identified and then destroyed the logistics center for Russia's most effective and feared drone unit, the Rubicon group. 

The storage sites were located near Mariupol, in occupied Donetsk. The strike eliminating them was launched yesterday. JL

Taras Safronov reports in Militarnyi:

Ukraine's Special Operations Forces struck the logistics base of the classified Russian Advanced Unmanned Technologies ‘Rubicon.’  The operation took place in occupied Manhush, the Donetsk region, on the night of April 17. A series of strikes on enemy targets was carried out using Middlestrike drones. Rubicon uses nearly all strike and reconnaissance drones available in Russia against Ukraine, with the exception of Shahed drones including conventional and fiber-optic FPV drones, Molniya and Lancet strike drones, ZALA, Orlan, and Supercam reconnaissance drones, as well as maritime and anti-aircraft drones.

Russia Running Out of Reserves As New Troops Deployed Less Than Loss Rate

There was a time when the Kremlin announced it was deploying new reserves to take an objective and western military experts worried if Ukraine could withstand the added pressure. Not so much anymore.

Russian forces are expected to be bolstered by 20,000 this summer, primarily for its ongoing bloodbath in Donbas. But these days, 20,000 Russians is less than two-thirds of the Kremlin's monthly losses. This suggests that the new deployment is unlikely to help achieve their unrealistic goals or change the war much - and if that is the largest force it can muster, that Russia is running short of reserves. JL

The Financial Times and The Institute for the Study of War report:

Russia is preparing to dip into its strategic reserve to add 20,000 troops to its force in southeastern Ukraine. 20,000 is below Russia's monthly losses, and may still outstrip Moscow's usable force-generation surplus, since new recruitment is no longer keeping pace with attrition and deployable reserves are limited. Russian forces have repeatedly failed to meet the Russian military command’s unrealistic deadlines. Russian forces set a deadline to seize Druzhkivka, Kostyantynivka, and Pokrovsk by the end of April 2026. They have not made the inroads in Kostyantynivka and Druzhkivka necessary to seize the settlements by the end of April. The deployment is unlikely to significantly alter the frontline; 20,000 soldiers are notably fewer than one month’s worth of Russian casualties.

New UKR Combined Aerial, Ground Drone Assault Units Overwhelm Russians

This winter, without fanfare, Ukraine deployed assault unis combining aerial, ground drone and infantry cadres in order to optimize the impact of its technological and tactical advantage. 

The results, in southern Ukrainian oblasts, were so successful in defeating Russian units and regaining territory, that the Ukrainian military has now made such units official and broadened their use for combat brigades. JL

Volodymyr Ivanishyn reports in the Kyiv Independent:

Ukraine has introduced "a new model of warfare - drone assault units, which combine aerial and ground drones with infantry into a single system. This approach has already shown results in the south (Zaporizhzhia and Dnipropetrovsk oblasts), where a large amount of territory has been liberated since February, due to the use of these latest units." Ukrainian drones carried out more than 22,000 front-line missions over three months.