Russia responds to Ukraine's ceasefire plan with escalation
Russia launched its largest yet air assaults on Ukraine’s cities in the 170th week of the war. In response, the EU threatened more sanctions and Taurus missiles
Report on week 170 of the Ukraine war, May 22 - 27. Hellenica covers the war in Ukraine on a weekly basis as a geopolitical story of the greatest consequence for all of Europe, including Greece.

Ukraine and Russia exchanged 1,000 prisoners of war each on May 23-25, their largest exchange in the three-year war, following a Russian proposal made during talks in Istanbul on May 16.
Any confidence built by that gesture may have been dissipated by Russia’s launching of its largest long-range aerial attacks against Ukrainian civilians during the same three days.
Russia launched 903 kamikaze drones and 92 missiles, killing at least 16 civilians.
Those strikes followed days of Ukrainian strikes on Russian military infrastructure in Russia’s Tula, Alabuga and Tatarstan regions, in which it used at least 800 drones.
In response to the Russian strikes, German foreign minister Johann Wadephul said on Tuesday Germany might supply Ukraine with the 1,000km-range Taurus missiles it has asked for at any time, without warning Russia, strengthening Ukraine’s ability to devastate Russian military factories.
Chancellor Friedrich Merz said he would impose no range limits on the weapons supplied to Ukraine.
The Kremlin reacted with alarm. Spokesman Dmitry Peskov said, “If such decisions are made, they will absolutely go against our aspirations to reach a political settlement,” and the Kremlin requested a UN Security Council meeting “in connection with the actions of European states trying to prevent a peaceful settlement of the Ukrainian crisis.”
Unlike Ukraine’s, Russia’s drones landed in cities, lighting up the skyline with exploding apartment buildings.
Ukrainian defenders managed to down 82 percent of the drones, which is lower than their usual rate. Military intelligence sources told The Economist that Russia was flying its drones at an altitude of over 2km, out of the range of mobile heavy machine gun units, and adapted the drones to use Ukraine’s own internet signal for navigation, immunizing them from electronic interference.
Russia also pressed on with its ground assaults in eastern Ukraine, and claimed to have captured six settlements in the regions of Sumy, Kharkiv and Donetsk. They also expanded a salient near the town of Pokrovsk, their main target this year, in preparation for a wider ground offensive.
“There is currently no indication that they are seriously considering peace or diplomacy. On the contrary, there is ample evidence that they are preparing new offensive operations. Russia is counting on a prolonged war,” Zelenskyy said in his Monday evening address.
For a moment even US president Donald Trump was angry with his Russian counterpart, Vladimir Putin, a man he openly admires.
“Something has happened to him,” Trump wrote on his social media platform referring to Putin. “He has gone absolutely CRAZY!”
Trump told reporters, “We're in the middle of talking and he's shooting rockets into Kyiv and other cities.”
Kremlin spokesman Dmitry Peskov belittled the US president’s reaction, speaking of the “emotional overstrain of everyone”.
The next diplomatic steps
Ukraine nonetheless stayed the diplomatic course, submitting a memorandum detailing its conditions for a ceasefire on Tuesday [May 27], fulfilling another Russian proposal.
Asked on May 23 about the reciprocal memorandum Russia is meant to submit, Russian foreign minister Sergey Lavrov had said, “Our work is at an advanced stage.” The Russian memorandum had not yet been reported received in Kyiv or Washington on Friday May 30.
Pope Leo XIV had offered the Vatican as a venue for the second round of talks that are to follow this exchange of memoranda, but Lavrov thought it “somewhat inelegant when two Orthodox countries would use a Catholic venue to discuss the root causes of the crisis,” preferring to return to Istanbul on June 2.
Russia considers Ukraine’s break with the Moscow Patriarchate and the creation of an autocephalous church in Kyiv to be one of those root causes.
Russia has insisted on a conditional ceasefire that addresses “the root causes underlying this conflict and how they must be excised like a malignant tumour.” The church is just one of the complicated issues this second round of talks will open up.
Another is the use of the Russian language. Ukraine is a largely bilingual country, but in 2019 it passed a lawobliging public servants to use Ukrainian. It did not ban Russian, but Russia calls that discriminatory.
“Ukraine, which lies beyond the constitutional borders of the Russian Federation, is home to millions of people who speak Russian. It is their native language,” Lavrov said at a press conference on Friday [May 23], speaking of free Ukraine. “Leaving them to the junta [government in Kyiv], which has banned them from speaking it… would be a crime,” he said. “We cannot allow this to happen under any circumstances.”
Another “root cause” according to the Kremlin is the very existence of the Zelenskyy government.
Russia insists Zelenskyy is illegitimate because he has stayed in power beyond his constitutional term, even though the constitution also allows him to do so in a time of national crisis, and the Ukrainian parliament has extended his presidency.
Zelenskyy himself offered to resign last February, if that meant Russia pulled back its troops and Ukraine were allowed to join NATO.
That offer was made to the United States, not Russia, and Trump ruled out NATO membership for Ukraine in a peace plan he delivered to Kyiv on April 17.
Yet that membership seemed to inch closer last week, with Piotr Lukasiewicz, Poland’s chargé d’affaires in Ukraine, telling the VOX Ukraine conference on Saturday [May 24] that Poland supports Ukraine’s accession to NATO and the EU.
He said relations had evolved during the three-year war. “This transformation has led us to a firm conviction that for security reasons, due to economic and political interests, Ukraine should be in the European Union as our partner — political, economic, social. Ukraine should also join NATO. This is our strategic, political, historical and civilizational interest,” Lukasiewicz said.
The US urged Russia on Thursday [May 28] to conclude a ceasefire agreement next week in Istanbul. “We want to work with Russia, including on this peace initiative and an economic package. There is no military solution to this conflict,” Acting Deputy U.S. Ambassador John Kelley told the Security Council. “The deal on offer now is Russia's best possible outcome. President Putin should take the deal.” If Russia continued the war, Kelley said, the US “will have to consider stepping back from our negotiation efforts.”
Moscow’s ‘buffer zone’
During his first visit to Kursk since it was secured from a Ukrainian counter-invasion on May 20, Putin held a televised press conference with local officials. One asked him to create a buffer zone in Ukraine’s neighbouring Sumy region. “Sumy must be ours,” he told Putin.
The following day, Putin announced that a buffer zone would be created inside Ukraine, an idea he first floated in March last year, when he said Kharkiv city would fall to Russian forces.
A military expert told Kremlin newswire TASS that Russian troops were advancing along a 15km-wide front in Sumy to establish that buffer zone.
On Sunday Putin’s right-hand man went further. “If military aid to the [Zelenskyy government] continues, the buffer zone could look like this,” Dmitry Medvedev, the deputy head of Russia’s National Security Council, wrote on his Telegram channel, showing a map with almost all of Ukraine shaded.
More sanctions for Russia
When he lashed out against Putin on Sunday, Trump wrote that Russia “deserves full-scale pressure, everything that can be done to limit their military capability.” But after speaking with Putin on the phone the next day, he refrained from actually attempting to limit that capability through further sanctions, even though the Sunday-to-Monday overnight attacks on Ukraine were bigger and deadlier than the attacks of the day before.
He now faces pressure to do so if Putin doesn’t agree to a ceasefire. “If nothing shifts, Russia can expect decisive action from the US Senate. Our bill will isolate Russia and turn it into a trading island,” read a statement from Senators Richard Blumenthal (a Democrat from Connecticut) and Lindsey Graham, a Republican from South Carolina.
The pressure is strongest in Europe, which is preparing an 18th package of sanctions against Russia.
Germany’s foreign minister, Johann Wadephul, told public broadcaster ARD on Sunday that those sanctions would come as a response to Russia’s latest attacks on Ukraine’s cities.
Reuters exclusively reported last week that Ukraine has asked the European Union to place secondary sanctions on those who purchased Russian oil, such as India and China, and Western companies that sell Russia high-tech products through third parties. Ukraine also reportedly asked the EU to take sanctions decisions by majority decision, to prevent Russophilic members from derailing them.
EU Energy Commissioner Dan Jørgensen has said that even such Russophilic members, notably Hungary and Slovakia, are adopting an EU roadmap to completely boycott Russian energy exports by 2027.
He recently gave MEPs a progress report. “By 2022, half of the coal we imported into the EU was Russian. We’ve stopped importing it completely. Oil imports dropped from 27 percent to 3 percent. And gas—from 45 percent in 2022 to 13 percent today,” Jørgensen said on Thursday [May 22], lamenting the fact that the EU still paid Russia €23bn last year for energy.
On the day Jørgensen spoke, the European Parliament approved sanctions on Russian and Belarusian agricultural products, as well as a stiff tariff on fertiliser from the two countries that will rise to €430 a tonne over three years.