Battles & Wars › Modern conflicts
Russia–Ukraine war
2014 – ; full-scale invasion from February 24, 2022· War· Europe
Well documentedSolid records, physical evidence or scientific consensus.
A war that began in 2014 and became, with Russia's full-scale invasion in 2022, Europe's largest war since 1945.
See it on the Battles & Wars map →What happened
In 2014 Russia seized Crimea and backed separatists in eastern Ukraine's Donbas, where about 14,000 died by 2021. On February 24, 2022, Russia invaded on several fronts. Ukraine stopped the drive on Kyiv and retook ground near Kharkiv and Kherson that autumn, but its 2023 counteroffensive stalled. Since then a front of trenches, mines and drones has shifted slowly; Russia holds about a fifth of Ukraine. Russia calls it a 'special military operation' against NATO expansion; Ukraine and most UN members call it unprovoked aggression.
Why it matters
It is Europe's biggest security crisis since World War II: it brought Finland and Sweden into NATO, triggered sweeping sanctions, and showed how drones are reshaping war.
How we know
UN human rights monitors, who have verified over 13,000 civilian deaths, satellite imagery, open-source analysts such as the Institute for the Study of War, International Criminal Court cases, and vast battlefield video.
Still debated
Military deaths are secret on both sides; estimates of killed and wounded run to the hundreds of thousands each. As of mid-2026, on-and-off peace talks had not ended the war.
Inside this (5)
Connections (18)
▸Trench warfare returned in Russia–Ukraine warMostly agreed
The connection
Along a front of roughly 1,000 km (600 miles), both armies dug trench lines, bunkers and minefields much like those of 1914–18. Drones watching every move made massed attacks as costly as charging machine guns once was, so gains are again measured in villages and yards, at heavy human cost.
When and how
In the Donbas from 2014, then along the whole southern and eastern front after 2022. Russia's 'Surovikin Line' defenses, built in late 2022, blunted Ukraine's 2023 counteroffensive.
How sure are we?
Satellite imagery of defensive lines, open-source maps of front-line changes, soldiers' accounts and video, and military analysts who explicitly compare the fighting to World War I.
Debates and open questions
Analysts debate whether the deadlock will last, as on the Western Front, or whether new tools such as better drones and electronic warfare will restore movement, as tanks eventually did.
▸Nuclear weapons and deterrence shapes Western caution in Russia–Ukraine warMostly agreed
The connection
Because Russia has the world's largest nuclear arsenal, NATO has avoided fighting Russian forces directly, refused a no-fly zone, and supplied weapons to Ukraine in stages, debating each step. Russian leaders have repeatedly hinted at nuclear use and in 2024 revised their doctrine to widen when it could be used.
When and how
From February 2022, when Putin put nuclear forces on 'special' alert, through debates in Washington, Berlin and other capitals over tanks, long-range missiles and F-16s.
How sure are we?
Public statements by US and NATO leaders citing escalation risk, Russia's published doctrine changes, and reporting on Western intelligence alarm about possible nuclear use in autumn 2022.
Debates and open questions
Whether Russia's threats were bluffs, and whether Western caution prolonged the war or prevented a wider one, are hotly debated.
▸Russian annexation of Crimea began Russia–Ukraine warWell documented
The connection
Seizing Crimea broke the post-Cold War principle that European borders would not be changed by force. Weeks later, armed separatists with Russian backing, and later Russian troops, took parts of Donetsk and Luhansk in the Donbas. That conflict, frozen but never settled by the Minsk agreements, set the stage for the 2022 invasion.
When and how
Crimea, February–March 2014; fighting in the Donbas from April 2014; Minsk ceasefire deals of September 2014 and February 2015, the second brokered by France and Germany.
How we know
Ukraine dates the war to February 20, 2014, the start date on Russia's own Crimea campaign medal; OSCE monitors documented Donbas fighting and Russian equipment.
Debates and open questions
Russia denied its troops fought in the Donbas before 2022. How far Moscow directed the separatists, and whether a firmer Western response in 2014 would have deterred 2022, are debated.
▸Battle of Kyiv (2022) ended Russia's bid for a quick win in Russia–Ukraine warMostly agreed
The connection
Russia appears to have planned a lightning war: take Kyiv within days and replace President Volodymyr Zelensky's government. When the assault failed, Moscow refocused on eastern and southern Ukraine, and the war became a long contest of artillery, manpower and industrial output, with Western aid sustaining Ukraine.
When and how
Kyiv's northern and western outskirts, including Hostomel, Bucha and Irpin, February–April 2022; Russia announced its refocus on the Donbas on March 25.
How sure are we?
Captured Russian plans, analyzed by Britain's Royal United Services Institute (RUSI), pointed to a roughly ten-day operation; Russia's own war aims then visibly narrowed.
Debates and open questions
Whether better planning could have taken Kyiv, and why Russian intelligence so misjudged Ukraine's will to fight, are still studied.
▸Drones and precision strike transformed the battlefield in Russia–Ukraine warWell documented
The connection
Cheap first-person-view (FPV) drones, steered through a pilot's video goggles, now cause a large share of front-line casualties, by some estimates most. Drones spot for artillery, drop grenades and hunt tanks, so troops can barely move unseen. Ukrainian sea drones pushed Russia's fleet out of the western Black Sea, and both sides strike deep with long-range drones.
When and how
Across Ukraine and Russia since 2022. Ukraine says it made over 2 million drones in 2024; in June 2025 smuggled Ukrainian drones hit bombers at air bases deep in Russia.
How we know
Battlefield video, statements by both governments, and think-tank studies estimating drones' share of casualties, though exact figures are hard to verify.
Debates and open questions
Whether cheap drones lastingly favor defenders, and whether jamming, interceptor drones or lasers can counter them, is the big open question for armies watching Ukraine.
▸Russia–Ukraine war revived the East–West confrontation of Cold WarMostly agreed
The connection
The 2022 invasion brought back a Cold War-style divide. NATO reinforced its eastern flank, long-neutral Finland and Sweden joined the alliance, Europe cut Russian energy imports, and Russia leaned on China, Iran and North Korea, which sent troops in 2024. New START, the last US–Russia nuclear arms treaty, expired in February 2026.
When and how
Europe, from February 2022. Finland joined NATO in April 2023 and Sweden in March 2024; North Korean troops fought in Russia's Kursk region from late 2024.
How sure are we?
NATO accession records, sanctions laws, energy-trade statistics, and Western and South Korean intelligence on North Korean troops, later acknowledged by Moscow and Pyongyang.
Debates and open questions
Scholars debate whether this is a new Cold War: unlike the Soviet Union, Russia offers no global ideology, and trade ties with China blur the blocs.
▸Second Nagorno-Karabakh War previewed the drone tactics of Russia–Ukraine warMostly agreed
The connection
Militaries studied Karabakh closely. Ukraine had already bought TB2s, and in early 2022 they struck Russian convoys and air defenses much as in Karabakh. Russia adapted and the TB2s faded, but the lesson that cheap drones can hunt armor returned as millions of small drones over Ukraine.
When and how
Lessons drawn from 2020 on by Ukrainian, Russian and Western planners; TB2s used against Russia's invasion from February 2022.
How sure are we?
Ukraine's TB2 purchases from 2019 and its combat footage are documented, and analysts wrote explicitly of Karabakh as a preview.
Debates and open questions
Whether the lesson was over-learned: Russia's denser air defenses and jamming soon made big drones like the TB2 far less useful in Ukraine.
▸Hypersonic missiles saw their first claimed combat use in the Russia–Ukraine warMostly agreed
The connection
Russia said it used its air-launched Kinzhal against an underground depot in western Ukraine on March 18, 2022, the first claimed combat use of a hypersonic missile. More Kinzhals and, reportedly, Zircons followed. In May 2023 Ukraine shot a Kinzhal down with a US Patriot, denting its image as unstoppable.
When and how
Deliatyn, Ivano-Frankivsk region, March 2022; the Patriot interception came over Kyiv in May 2023.
How sure are we?
Russian Defense Ministry statements, Ukrainian Air Force reports, recovered debris, and US confirmation of the Patriot interception.
Debates and open questions
Many analysts call the Kinzhal an air-launched ballistic missile, not a true maneuvering hypersonic weapon, so whether this counts as the first use is debated.
▸Electronic warfare (jamming and chaff) jams drones and GPS in the Russia–Ukraine warWell documented
The connection
Since 2022 both Russia and Ukraine have used jamming on a massive scale. It cuts the radio links of small drones and spoofs GPS signals, pushing guided bombs and shells off target. Both sides respond with new frequencies, drones steered through fiber-optic cables they unspool behind them, and onboard guidance that can finish an attack without a signal.
When and how
Front lines in Ukraine and western Russia, 2022 onward; Russian systems such as Krasukha and Pole-21, and Ukrainian jamming and drone units.
How we know
Reports from both militaries, Western analysts, and published assessments, such as those of US-supplied guided shells losing accuracy to jamming.
Debates and open questions
Exact effects are hard to verify in wartime; each side publicizes successes and hides failures, and the balance between drones and jammers keeps shifting.
▸Cyber warfare (Stuxnet) hit power grids and satellite links in the Russia–Ukraine warWell documented
The connection
Ukraine became the testing ground for Russian military hackers. They cut power to about 225,000 people in December 2015 and hit Kyiv's grid in 2016. As the invasion began on February 24, 2022, a hack disabled Viasat satellite modems used by Ukraine's forces and thousands of customers across Europe.
When and how
Ukraine, from 2014; Russia's GRU military intelligence, including the unit known as Sandworm, is blamed for the grid attacks, NotPetya and the Viasat hack.
How we know
Forensic reports by Ukrainian agencies and firms such as ESET, Dragos and Microsoft, plus formal US, UK and EU attributions.
Debates and open questions
Why cyberattacks did less damage in the 2022 invasion than many expected is debated: strong Ukrainian defense, Western help, or Russia's own choices.
▸AI and data-driven warfare is being tested at scale in the Russia–Ukraine warWell documented
The connection
Ukraine combines drone, satellite and soldier reports in software such as its Delta system and Palantir tools, using AI to spot targets and speed strikes. Both sides add AI to drones so they can lock onto targets when jamming cuts their links. Western companies test products there in real combat.
When and how
Across Ukraine's front since 2022, involving Ukrainian developers, Palantir and other Western firms, and Russian drone makers.
How we know
Statements by Ukrainian officials and companies, combat video, and reporting from the front; exact performance data remain classified.
Debates and open questions
How autonomous drones in Ukraine really are, and whether any already choose targets without human approval, is hard to verify.
▸Kalashnikov's Izhevsk arms plant (Izhmash) makes Russia's rifles and Lancet drones in the Russia–Ukraine warWell documented
The connection
Now Kalashnikov Concern, part of Russia's state group Rostec, the plant supplies AK-12 rifles to Russian forces, and its ZALA subsidiary makes the Lancet, a loitering munition: a drone that circles, then dives onto its target. Lancets have been widely used against Ukrainian artillery and vehicles since 2022. The company says output has risen sharply.
When and how
Izhevsk and ZALA's plants, 2022 onward; the US and EU sanctioned Kalashnikov Concern from 2014, after Russia's annexation of Crimea.
How we know
Company statements, Russian and Ukrainian military reports, and drone wreckage examined by independent analysts identify Kalashnikov products in the war.
Debates and open questions
Real production numbers are secret, and how much Lancets depend on imported Western or Chinese parts is debated.
▸Hanwha and South Korea's arms export boom won record Polish orders during the Russia–Ukraine warWell documented
The connection
After the 2022 invasion, Poland gave much of its old artillery to Ukraine and needed replacements fast. In July 2022 it agreed with Hanwha on 672 K9 howitzers, and later that year on 288 Chunmoo rocket launchers; the first 24 K9s arrived that December. South Korea's arms export deals hit a record of about $17 billion in 2022.
When and how
Warsaw and Seoul, 2022–24; the first firm contract was signed in August 2022, alongside deals for Hyundai Rotem tanks and KAI jets.
How we know
Polish Armament Agency contracts and delivery ceremonies, and South Korean government export figures.
Debates and open questions
Whether all framework orders become firm contracts depends on Polish financing and local production; South Korea itself does not send weapons directly to Ukraine.
▸Anduril Industries has supplied drones to Ukraine in the Russia–Ukraine warWell documented
The connection
Through US aid, Anduril sent Altius loitering munitions and Ghost reconnaissance drones to Ukraine. The Wall Street Journal reported in 2025 that Ukrainian units found Altius drones crashed or missed and stopped using them in 2024, and that Ghosts struggled against Russian jamming. Palmer Luckey says Altius destroyed valuable Russian targets.
When and how
Ukraine, from 2022; the Wall Street Journal and Reuters investigations appeared in November 2025.
How we know
US aid lists and company statements confirm the deliveries; performance accounts conflict, and Ukraine's military declines to comment, citing secrecy.
Debates and open questions
Whether the failures reflected design flaws, Russia's heavy jamming, or early versions since improved is disputed.
▸Ukraine's wartime drone industry builds millions of drones a year in the Russia–Ukraine warWell documented
The connection
Short of shells and aircraft, Ukraine turned drones into its main weapon. Factories, often small and dispersed to survive Russian strikes, produce millions a year. By many estimates drones now cause most casualties at the front, and long-range ones hit Russian refineries, airbases and arms plants.
When and how
Across Ukraine from 2022; in June 2025 Operation Spiderweb used drones smuggled into Russia in trucks to hit bombers at bases thousands of kilometers away.
How we know
Ukrainian production data, combat video, Russian admissions of damage, and satellite imagery of struck sites; casualty shares are estimates.
Debates and open questions
Whether drone mass can win the war or only freeze it, and how much Ukraine's output depends on Chinese components.
▸Iran's Shahed drones and Russia's Alabuga plant fuel Russia's long-range drone strikes in the Russia–Ukraine warWell documented
The connection
Since September 2022 Russia has fired Shaheds, renamed Geran-2, at Ukrainian cities, power plants and rail lines, often mixed with decoys and missiles. Tallies of Ukrainian Air Force reports count about 54,000 Shahed-type drones and decoys launched in 2025. With missiles, the waves knocked out much of Ukraine's power generation.
When and how
Across Ukraine from September 2022, with production at Alabuga in Tatarstan from 2023.
How we know
Ukrainian Air Force daily reports, wreckage with Russian serial numbers, and leaked Alabuga production documents.
Debates and open questions
How much the strikes shape the war's outcome, versus draining defenses and terrorizing civilians, is debated; Russia says it targets military and energy sites.
▸SpaceX and Starlink in Ukraine kept Ukraine's forces online in the Russia–Ukraine warWell documented
The connection
With Russian strikes and jamming hitting normal networks, Starlink's small dishes gave Ukrainian units fast internet almost anywhere. Troops used it to fly drones, share targeting data and talk to commanders. Russian forces got smuggled terminals too, until a February 2026 whitelist cut off unregistered ones.
When and how
Ukraine, from February 28, 2022; SpaceX, Ukraine's government, Poland and, from 2023, the Pentagon paid for service.
How we know
Ukrainian and SpaceX statements, Pentagon contracts, and military officials' descriptions of its role; Russia acknowledged the 2026 cutoff of its terminals.
Debates and open questions
Whether Ukraine could fight without Starlink, as Musk once claimed it could not, and whether Europe's alternatives will be ready, are debated.
▸Rheinmetall and Europe's rearmament multiplied its shell output in response to the Russia–Ukraine warWell documented
The connection
Before 2022 Rheinmetall made about 70,000 large-caliber shells a year. The invasion, and Ukraine's huge appetite for 155 mm rounds, changed that: it expanded plants in Germany and Spain, opened Unterlüß, and plans over 1 million shells a year by 2027, plus plants in Lithuania and inside Ukraine.
When and how
Germany, Spain, Lithuania and Ukraine from 2022; CEO Armin Papperger led the expansion.
How we know
Company reports, government contracts including Germany's €8.5 billion shell framework of 2024, and deliveries confirmed by Ukrainian officials.
Debates and open questions
Whether targets will be met on time, and when the delayed plant in Ukraine will open, are uncertain; Ukraine's needs still exceed Europe's output.