BBC News 5 April 2022 - by the Visual Journalism Team
Russian forces have refocused their efforts on operations in the east of the country, as Ukrainian troops have regained control of large areas around Kyiv.
Here are the latest developments on day 41 of the invasion:
Russia launched its attack on 24 February, but nearly six weeks into the war Russian forces have retreated from the outskirts of Kyiv and are focussing on fighting in the east of the country.
Ukraine may have "won the Battle of Kyiv", but analysts at the Institute for the Study of War warn the war could still go Russia's way if it is successful in its eastern offensive.
Russian units which have withdrawn from the north of the country are likely to require significant re-equipping before being available for deployment in the east, says the UK Ministry of Defence (MoD).
Ukrainians retake key terrain in the north
Ukrainian forces have retaken territory around Kyiv and Chernihiv, as Russian troops have withdrawn across the borders into Belarus and western Russia.
Ukraine has accused Russia of killing civilians in the town of Bucha, just outside the capital, after reporters found bodies strewn in the streets.
Satellite images of the area appear to also show bodies left in the open.
Ukrainian forces have been carrying out clearing operations looking for pockets of Russian troops who have been unintentionally left behind.
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Russia targets full control in the east
With recent setbacks elsewhere in the country, Russian officials have said that the focus of its forces is now the "complete liberation" of the Donbas.
The Donbas broadly refers to Ukraine's eastern regions of Donetsk and Luhansk, where Russian-backed separatists held significant territory before Russia's invasion.
The UK's Ministry of Defence says Russian forces are consolidating and reorganising as they refocus on the region. They are also reported to be moving mercenaries to the area from private military company Wagner, which has links to the Russian state.
Russian troops advancing through Izyum are preparing for an attack on Slovyansk, according to the ISW.
Efforts to capture Slovyansk "will likely prove to be the next pivotal battle of the war", they say. From Slovyansk, Russian units may attempt to link up with other Russian troops to encircle Ukrainian forces in the Donbas.
Russian progress slows in the south
Russian forces initially made rapid gains in the south, with their main objective being the creation of a land corridor between Crimea, which it annexed in 2014, and areas held by Russian-backed separatists in Donetsk and Luhansk.
Standing in the way of that objective has been the port city of Mariupol, which has been encircled by Russian forces since the start of March.
Russian forces have been advancing further into the centre of the city, but Ukrainian forces are still in control of some areas.
Life for civilians in Mariupol has been grim. Endless bombardments have left widespread destruction and the city's deputy mayor says people are dying from starvation and dehydration.
To the west, Russia had been attempting to push towards Odesa, with the aim of cutting off Ukraine's access to the Black Sea. Their advances stalled at Mykolaiv, where a counter-attack by Ukrainian troops has pushed Russian forces back towards the city of Kherson.
But Russia continues to launch air strikes against Odesa, with oil facilities targeted in the latest attack on Monday.
By David Brown, Bella Hurrell, Dominic Bailey, Mike Hills, Lucy Rodgers, Paul Sargeant, Mark Bryson, Zoe Bartholomew, Sean Willmott, Sana Dionysiou, Joy Roxas, Gerry Fletcher, Jana Tauschinsk, Debie Loizou and Prina Shah.
About these maps
To indicate which parts of Ukraine are under control by Russian troops we are using daily assessments published by the Institute for the Study of War with the American Enterprise Institute's Critical Threats Project.
From 2 March this daily assessment differentiated between "Assessed Russian-controlled Ukrainian territory" and "Assessed Russian advances in Ukraine", the latter indicating areas where Russians are believed to have launched attacks from but which they do not control.
To show key areas where advances are taking place we are also using daily updates from the UK Ministry of Defence and BBC research.
The situation in Ukraine is fast moving and it is likely there will be times when there have been changes not reflected in the maps.
