KYIV – Ukraine said on Tuesday that the last 24 hours were the deadliest of the war so far for Russian troops, as Moscow hurls tens of thousands of freshly mobilised soldiers and mercenaries into relentless winter assaults in the east.

The Ukrainian military increased its running tally of Russian military dead by 1,030 overnight to 133,190, and described the increase as the highest of the war so far. It also said its troops destroyed 25 Russian tanks in two days.

The report of enemy dead could not be independently confirmed, and Moscow denied its forces have suffered losses on such a scale while also claiming to have killed thousands of Ukrainians.

But the unprecedented scale of reported casualties fits accounts from both sides that describe battles in snow-covered trenches as the deadliest combat of the war, despite little progress by either side at the front.

The war is entering its second year at a pivotal juncture, with Moscow attempting to regain the initiative, while Kyiv is holding out for Western tanks for a counter-offensive.

After failing to capture Kyiv in 2022 and losing ground through the second half of the year, Moscow is now making full use of hundreds of thousands of troops called up over the past few months in its first mobilisation since World War II.

Kyiv and the West say Russia has been pouring additional troops into eastern Ukraine in recent weeks to claim new gains around the time of the first anniversary of its full-scale invasion later in February.

The last few weeks have seen Russia boast its first gains for half a year. But the progress has still been incremental, with Moscow yet to capture a single major population centre in its winter campaign despite thousands dead.

Fighting has focused for months around the Ukrainian-held city of Bakhmut in eastern Donetsk province, a city with a pre-war population of around 75,000 that Russia has been trying to encircle.

Moscow has also launched an assault farther south against Vuhledar, a Ukrainian-held bastion on high ground at the strategic intersection between the eastern and southern front lines.

In a daily intelligence update, Britain’s Defence Ministry said Russia’s military has been attempting since early January to restart major offensive operations to capture Ukraine-held parts of the Donetsk region, but has gained little ground so far.

The Russians “lack munitions and manoeuvre units required for a successful offensive”, it said.

“Russian leaders will likely continue to demand sweeping advances. It remains unlikely that Russia can build up the forces needed to substantially affect the outcome of the war within the coming weeks,” added the ministry.

Ukrainian officials say Moscow could be accumulating weapons and reserves for an even bigger push in the coming weeks. The Ukrainian governor of Luhansk province predicted a big Russian offensive there that could begin around next Wednesday.

The past few weeks have seen a purge of Ukrainian officials in an anti-corruption campaign, the first big shake-up of Ukraine’s leadership since the war began.

In his Monday evening address, Ukrainian President Volodymyr Zelensky said personnel changes on the border and front line would bolster Ukraine’s military efforts.

However, he gave no indication about the fate of Defence Minister Oleksii Reznikov. The head of Mr Zelensky’s party’s parliamentary faction had said on Sunday that Mr Reznikov would be replaced, but appeared to row back for now on Monday, saying no changes would be made this week.

Since the New Year, Western countries have pledged hundreds of tanks and armoured vehicles to Ukraine to give it the firepower and mobility to push through Russian lines and recapture occupied territory later this year.

A new United States package of weapons is expected to include longer-range rockets, which would give Ukraine the ability to hit Russian supply lines in all of the territory it occupies in Ukraine’s mainland and parts of the Crimea peninsula.

But Ukraine will not receive the new capabilities for months, and meanwhile, it faces a Russian force with its manpower replenished by Moscow’s call-up of reservists.

The European Union said Mr Zelensky has been invited to take part in a summit of EU leaders. They are gathering in Brussels later this week. Should Mr Zelensky attend, it would be only his second foreign trip since the invasion began, after he visited Washington in December.

Mr Zelensky’s office did not respond to a request for comment. REUTERS