On Sept. 5, 2014, at a road checkpoint near the village of Tsvitni Pisky in eastern Ukraine’s Luhansk region, a two-vehicle Ukrainian army column drove into what appeared to be a friendly position. A Ukrainian flag had been hoisted at the checkpoint. Ukrainian-uniformed soldiers were visible on the road. When the lead truck stopped, gunfire and a thermobaric rocket destroyed both vehicles. Twenty-two Ukrainian soldiers of the Aidar Battalion were killed. Four were wounded. The men who ambushed them were members of a small Russian ultranationalist paramilitary unit called Rusich, operating that day alongside larger separatist formations under Kremlin patronage.
Nine years later, in July 2023, one of the two founders of Rusich walked into Helsinki-Vantaa Airport en route to a family vacation in Nice. He was traveling as Voislav Torden, a name he adopted in a legal name change after the European Union sanctioned him in December 2022 under his birth name, Yan Petrovsky, for his connections to the Wagner Group and his role in leading one of the most notoriously brutal Russian paramilitary formations to emerge from the war in Donbas.
He initially entered Finland on July 19, 2023 with his wife and children at the Vaalimaa road border station in southeastern Finland on his wife’s student visa and his dependent permit. A Finnish border guard’s inspection turned up a facial recognition match to Petrovsky, the name he had used when he fought alongside Wagner forces in Ukraine and Syria. The next morning, Finnish Border Guard officers detained him at the airport as he and his family prepared to board the plane bound for France.
Torden’s airport arrest and eventual conviction by a Finnish lower court in March 2025 for war crimes arising from the ambush on the Aidar Battalion became one of Europe’s most important recent tests of whether a domestic court can prosecute a member of Russia’s irregular forces for crimes committed years earlier in another country’s war. His conviction and life sentence marked the first successful use of universal jurisdiction anywhere to convict a member of a Russian mercenary or irregular formation for war crimes committed in Ukraine before Russia’s full-scale invasion in 2022.
On Aug. 31, the Helsinki Court of Appeal reaffirmed the central legal significance of that judgment, again finding the 2014 fighting to be an international armed conflict and holding Torden criminally responsible for war crimes, personally and as deputy commander of Rusich. Torden’s failure to properly supervise the actions of two subordinates effectively under his command and control resulted in the commission of a war crime. But while the appellate court has now convicted Torden on the count that carries legal responsibility for the 22 Ukrainian soldiers killed in the ambush itself, it acquitted him of the willful killing of four further soldiers from the same column who had been wounded or trapped by the initial strike, and of the mutilation of one more — reducing his life sentence to 12.5 years. That reduction has been widely reported as a partial victory for the defense. Compared with the broader victory for international justice embodied in the appellate ruling, however, that is a modest win for a convicted war criminal who tried and failed to recast himself as a marginal participant in a conflict that the defense disputed as non-international in character.
Russia’s Irregular Forces
The ruling carries significance beyond this specific case. For a decade, the Kremlin’s gray-zone strategy in Ukraine, Syria, and Africa’s Sahel region has relied on the calculated ambiguity of formations like the Wagner Group, its Africa Corps successor, and affiliates such as Rusich. State-adjacent, contractually detached, deniable in Moscow, and until recently unreachable in Western courts, they operated in the space between Russian defense policy and Russian organized crime.
Much of what is known about Russia’s irregular forces from 2014 to 2023 stems from leaked digital files from the late Wagner leader Yevgeny Prigozhin’s shell companies, detailing in granular fashion the timeline of his consultations with top-tier Kremlin decisionmakers, and painting a complex picture of Wagner’s internal power structures. Additional colorful details about Russia’s irregular forces can be culled from Wagner’s substantial social media presence. One key detail that emerged from the company files and documents is that many Wagner operatives were issued Russian passports lodged under false names. Research led by one of us (Rondeaux) at New America’s Future Frontlines program, based on leaked Wagner Group records, has catalogued more than 5,800 Wagner personnel who carried false Russian identity documents between 2014 and 2021. The catalogue documents names, call signs, and career trajectories. Both Rusich commanders are referenced in those personnel records. Prosecutors building cases against Wagner-linked personnel can expect, as the Torden case demonstrates, that prominent paramilitary commanders can be traced through open-source documentation.
But they should now also assume the Torden precedent may apply. The appellate court’s landmark decision opens new avenues for potential prosecution of Russian irregular forces, widening the scope of not only who can be brought to account but also answering the question of when Russia’s war in Ukraine began for purposes of international criminal responsibility.
The judgment also recasts the terms of a doctrinal debate about the blurred lines defining proxy warfare that has raged since the International Criminal Tribunal for the former Yugoslavia handed down its judgment in the case of Duško Tadić in 1999. That ruling accepted a lower legal threshold for considering a foreign state’s relationship to an organized armed group sufficient to internationalize a conflict, departing from the stricter “effective control” test the International Court of Justice articulated in Nicaragua v. United States in 1986. The lower test is one of “overall control.”
That question goes to the heart of Russia’s long-running effort to shape the legal terms of proxy warfare by preserving distance between the state and armed groups acting in its interests. Russia’s official story about Ukraine has always been that the war started in February 2022. Everything before that – targeted attacks on civilian infrastructure, torture of prisoners of war, extrajudicial killings of political figures, in Moscow’s telling, was a civil war in which Russia was not a party. The Kremlin asserts that the fighting in Donbas from 2014 was not a clash between two sovereign states, but a non-international armed conflict, a localized struggle between Kyiv and pro-Russian separatists fighting the Ukrainian government. Pro-Russian paramilitary “volunteer units” like Rusich and Wagner Group operating in Donbas before Russia’s full-scale invasion were not, Moscow insists, covert instruments of the Russian state, but independent combatants with no legally meaningful connection to Russian security forces under Putin’s command.
Politically, if the separatist formations were genuinely independent or autonomous, Russia could distance itself from responsibility for their conduct and deny the Kremlin’s military role as peripheral or nonexistent, as Putin often argued until Wagner forces marched on Moscow in open rebellion against the state in June 2023. Putin applied the same obfuscating legalese in labeling the 2022 phase of the war a “special military operation,” while selectively punishing anyone who calls it otherwise and criminalizing the sharing of “false information” about Russia’s armed forces. This obfuscation serves two purposes: domestically, Moscow avoids the general mobilization a declared war would require; internationally, it is Russia’s legal firewall against both state responsibility for the paramilitary formations fighting on its behalf and criminal responsibility for the war crimes those formations commit. In applying its own interpretation of Tadić, the Finnish appellate court exposed a chink in that armor.
Putin had already weakened his own defense in the summer of 2023. In a nationally televised address three days after Prigozhin abandoned his mutiny against Moscow, Putin admitted on camera that “the financing of the entire Wagner Group was fully ensured by the state,” disclosing that the Russian Ministry of Defense had spent about $1 billion supporting Wagner operations between May 2022 and May 2023. In the language of the Tadić test, he had placed significant evidence of overall control into the public record himself. But the August 2023 plane crash then killed Prigozhin and Dmitry Utkin, Wagner’s top operational commander, removing much of the group’s senior leadership and complicating any effort to establish accountability for Wagner’s conduct in Ukraine, Syria, and parts of Africa.
The circumstances leading to Yan Petrovsky’s decision to legally change his name to Voislav Torden in 2022 are murky. But his personal journey to the heart of the controversies associated with Wagner’s conduct was clearer. Born in the Siberian city of Irkutsk in 1987, he spent his adolescence in the Norwegian coastal town of Tønsberg after his mother remarried. By the spring of 2014, Petrovsky — then still shuttling between Oslo and St. Petersburg — had joined a Russian Imperial Movement paramilitary training program alongside Alexei Milchakov, a self-avowed neo-Nazi; the volunteer detachment they formed there surfaced publicly as Rusich that July, attached to the pro-Russian Batman Battalion fighting in Luhansk. Norwegian police deported Petrovsky to Russia in October 2016 after determining his ties to the right-wing extremist Nordic Resistance Movement and to the Russian ultranationalist underground he had been cultivating from an Oslo tattoo shop.
Both men trained at the paramilitary program run by the Russian Imperial Movement, which the U.S. State Department designated in April 2020 as the first white-supremacist organization ever listed as a Specially Designated Global Terrorist entity. Rusich fought alongside Wagner Group units in Ukraine in 2014 and 2015, following Wagner to Syria in 2016 and 2017. Torden (aka Petrovsky) is also inextricably linked with Milchakov’s suspected involvement in the brutal murder of Syrian national Hamdi Bouta in 2017. Five years later, Rusich quietly advertised their return to Ukraine in social media postings discovered by New America in January 2022.
The U.S. Treasury Department sanctioned Petrovsky, Milchakov, and Rusich in September 2022, and the EU followed suit in December 2022. Milchakov commanded the unit until he was wounded near Kharkiv, Ukraine, later that year, at which point Torden (aka Petrovsky) took over. Torden denied his leadership role to Finnish authorities, saying he had been in the Donetsk and Luhansk regions to provide “humanitarian aid” and to engage in “ideological propaganda.” In their later appeal, Torden’s defense team took a slightly different tack, echoing Putin’s rhetoric, contesting the prosecution’s assertion that Russia and Ukraine had been at war in Donbas by September 2014 and that Wagner, Rusich, and the smaller Kremlin-aligned formations were belligerents in it from the outset. (If the war were an internal armed conflict within Ukraine instead of an international one between Ukraine and Russia, it would have narrowed the nature and scope of war crimes prosecutable under Finnish domestic law.)
The Helsinki appellate decision rejected that assertion, and like the lower court aligned with a 2022 ruling by a Dutch court, that found that Russia had exercised overall control over the self-proclaimed Donetsk People’s Republic in eastern Ukraine when pro-Russian separatist forces shot down Malaysia Airlines Flight MH17 killing all 298 people aboard in July 2014. In that case, the Dutch District Court cited Moscow’s provision of weapons, personnel, and training as well as its influence over senior appointments and military operations. The Finnish judiciary’s ruling extended that reasoning to the fighting in Luhansk several months later, providing further judicial recognition that Russia’s war in Ukraine was already international in character years before the February 2022 invasion.
Four Lessons from the Rusich Case Beyond Helsinki
The decision ensures that, at least outside of Russia, victims of abuses attributed to Russian forces – conventional or irregular – might have a path to remedy, though the modest compensation on offer to the family members of Aidar Battalion fighters raises questions about the fairness of that remedy – a few thousand euros per family member, based on Finnish tort law.
The Torden prosecution is the first European case brought against a Russian irregular-warfare commander for atrocity crimes committed in Ukraine, and the most substantial European domestic prosecution of any Wagner-adjacent figure to date. A 2024 study led by the War Crimes Research Office at American University identified six European jurisdictions best positioned to prosecute Russian atrocity crimes under universal-jurisdiction principles: Germany, Sweden, France, Finland, the Netherlands, and Norway. The Aug. 31 Finnish ruling is now the reference text for the rest, and it carries four implications.
First, Finland’s evidentiary standards will help define what future prosecutions can realistically achieve. By dismissing the most serious counts where the evidence fell short, the appellate court gave the surviving judgment a degree of credibility that an unaltered life sentence might not have carried. For the broader accountability project, a judgment that can withstand serious scrutiny in a foreign courtroom is more valuable than a maximalist ruling that cannot.
Second, command responsibility on the narrower reading the appellate court applied will make future prosecutions of fighters for Wagner – and possibly Africa Corps – difficult. Prosecutors must show which specific subordinates were under effective command and control of the superior, that those subordinates committed the specific acts alleged, and that the defendant failed to prevent or punish them. The command structures of Russian irregular forces have been documented to a degree. But experience shows that it takes considerable effort to triangulate and move from lead evidence to prosecution.
Third, the case demonstrates the importance of cross-border collaboration. When Finnish investigators needed to identify the voice giving the shooting order on a Rusich cellphone video, they sent the recording to the Estonian Forensic Science Institute. Forensic analysis indicated that the voice recorded did not match Torden’s, which proved decisive in the outcome of the most serious count on appeal. Similarly, mutual legal assistance protocols between Finnish investigators and Ukraine’s Office of the Prosecutor General, and the witness-interview procedures developed for Aidar survivors testifying by video link from Kyiv proved crucial. Interpreters’ work to translate the proceedings will also serve as reusable capacity for the next case in Finland. The model is exportable to the other jurisdictions.
Fourth, the Finnish Border Guard’s detection and subsequent arrest of Torden after his entry into the Schengen visa area highlights the importance of travel bans against Russian fighters as both a law enforcement tool and a critical component of accountability. Torden had previously been barred from entering the Schengen zone under his former identity, Yan Petrovsky, but nonetheless entered Finland under a new name and with a Finnish residence permit. It was a routine border check, intelligence information linking the two identities, and facial-recognition analysis that ultimately exposed the deception and brought him into Finnish custody.
Entry bans and sanctions are often treated primarily as instruments of pressure or exclusion, but the Torden case shows that in practice they can also create the administrative tripwires that place suspected perpetrators within reach of investigators. That logic has gained urgency since Germany’s determination that Russia was behind an attempted August 2026 attack at Leipzig/Halle airport, where an explosive-laden drone was found beside Ukrainian cargo aircraft used in NATO airlift operations. One of the suspected operatives reportedly entered the Schengen area on a tourist visa issued by Italy, prompting renewed EU discussion of tighter Russian visa restrictions and an EU-wide entry ban on current and former Russian combatants.
None of this makes the ruling a straightforward victory for Ukraine. Torden’s sentence reduction and the two dismissed counts will likely be interpreted by Aidar Battalion families as a partial failure to name clearly and with force what happened to their loved ones. Both objections are fair. A Nordic court capable of reversing itself on the evidence in a case that carries this much political weight is nonetheless the kind of court whose convictions will hold when the war ends and the political weather changes.
Torden’s defense team has publicly stated that it will appeal the decision to the Finnish Supreme Court. Torden’s attorney, Natalia Malgina, told Russia’s state press agency TASS that the aim is full acquittal. As of this writing, there has been no official record of a defense appeal being filed, and no public notice has been provided by the prosecution as to whether it intends to cross-appeal to restore the original counts. Historically, the Supreme Court has rarely granted such leave and only for cases raising novel questions of law. Given the appellate court’s careful record, denial is the likelier outcome. If leave is denied, the appellate ruling becomes the working precedent for European Russian-atrocity prosecutions. For prosecutors building the next file against Russian irregulars in Berlin, The Hague, Paris, Oslo, or Stockholm, it is the closest thing they have to a manual. Milchakov, the Rusich co-founder, was last known to be in Russia according to postings on the unit’s Vkontakte social media account in 2024 (the account has since been taken down. Reportedly Rusich was operating under Russian military cover near the Finnish-Russian border.
