Why is Russia invading Ukraine and what does Putin want?
By air, land, and sea, Russia has launched a devastating attack on Ukraine, a European democracy of 44 million people, and its forces are on the outskirts of the capital, Kyiv.
For months, President Vladimir Putin denied he would invade his neighbour, but then he tore up a peace deal, sending forces across borders in Ukraine's north, east and south.
As the number of dead climbs, he stands accused of shattering peace in Europe. What happens next could jeopardise the continent's entire security structure.
Why have Russian troops attacked?
Russian troops are closing in on Ukraine's capital, days after Russia's leader ordered a full-scale invasion from the north, east and south. In a pre-dawn TV address on 24 February, he declared Russia could not feel "safe, develop and exist" because of what he claimed was a constant threat from modern Ukraine.
Airports and military headquarters were hit first then tanks and troops rolled into Ukraine from Russia, Russian-annexed Crimea and ally Belarus.
Many of President Putin's arguments were false or irrational. He claimed his goal was to protect people subjected to bullying and genocide and aim for the "demilitarisation and de-Nazification" of Ukraine. There has been no genocide in Ukraine: it is a vibrant democracy, led by a president who is Jewish.
"How could I be a Nazi?" said Volodymr Zelensky, who likened Russia's onslaught to Nazi Germany's invasion in World War Two. Ukraine's chief rabbi and the Auschwitz Memorial have also rejected Mr Putin's slur.
President Putin has frequently accused Ukraine of being taken over by extremists, ever since its pro-Russian president, Viktor Yanukovych, was ousted in 2014 after months of protests against his rule.
Russia then retaliated by seizing the southern region of Crimea and triggering a rebellion in the east, backing separatists who have fought Ukrainian forces in a war that has claimed 14,000 lives.
Late in 2021, Russia began deploying big numbers of troops close to Ukraine's borders, while repeatedly denying it was going to attack. Then Mr Putin scrapped a 2015 peace deal for the east and recognised areas under rebel control as independent.
Russia has long resisted Ukraine's move towards the European Union and the West's defensive military alliance, Nato. Announcing Russia's invasion, he accused Nato of threatening "our historic future as a nation".
How far will Russia go?
It is now clear that Russia is seeking to overthrow Ukraine's democratically elected government. Its aim is that Ukraine be freed from oppression and "cleansed of the Nazis".
President Zelensky said he had been warned "the enemy has designated me as target number one; my family is target number two".
This false narrative of a Ukraine seized by fascists in 2014 has been spun regularly on Kremlin-controlled TV. Mr Putin has spoken of bringing to court "those who committed numerous bloody crimes against civilians".
What Russia's plans are for Ukraine are unknown, but it faces stiff resistance from a deeply hostile population.
In January, the UK accused Moscow of plotting to install a pro-Moscow puppet to lead Ukraine's government - a claim rejected at the time by Russia as nonsense. One unconfirmed intelligence report suggested Russia aimed to split the country in two.
In the days before the invasion, when up to 200,000 troops were near Ukraine's borders, Russia's public focus was purely on the eastern areas of Luhansk and Donetsk.
By recognising the separatist areas controlled by Russian proxies as independent, Mr Putin was telling the world they were no longer part of Ukraine. Then he revealed that he supported their claims to far more Ukrainian territory.
The self-styled people's republics cover little more than a third of the whole of Ukraine's Luhansk and Donetsk regions, but the rebels covet the rest, too.
Russia attacks Ukraine: More coverage
- LIVE: Latest updates from on the ground
- THE BASICS: Why is Putin invading Ukraine?
- ZELENSKY: Comedian president rises to the moment
- DNIPRO: Terrified residents jolt into action
- PHOTOS: Ordinary lives turned upside down
How dangerous is this invasion for Europe?
These are terrifying times for the people of Ukraine and horrifying for the rest of the continent, witnessing a major power invading a European neighbour for the first time since World War Two.
Hundreds have died already in what Germany has dubbed "Putin's war", both civilians and soldiers. And for Europe's leaders, this invasion has brought some of the darkest hours since the 1940s.
France's Emmanuel Macron has spoken of a turning point in Europe's history while Germany's Olaf Scholz has warned that "Putin wants a Russian empire" - to take over Europe according to his world view. Recalling the Cold War days of the Soviet Union, Volodymyr Zelensky spoke of Ukraine's bid to avoid a new iron curtain closing Russia off from the civilised world.
Image source, EPAFor the families of both armed forces, there will be anxious days ahead. Ukrainians have already suffered a gruelling eight-year war with Russian proxies. The military has called up all reservists aged 18 to 60 years old.
Top US military official Mark Milley said the scale of Russian forces would mean a "horrific" scenario, with conflict in dense urban areas.
This is not a war that Russia's population was prepared for, either, as the invasion was rubber-stamped by a largely unrepresentative upper house of parliament.
The invasion has knock-on effects for many other countries bordering both Russia and Ukraine. Five countries are seeing a big influx of refugees, while the UN children's agency says its projected scenario is for up to five million refugees. Poland, Moldova, Romania, Slovakia and Hungary are all braced for arrivals.
What can the West do?
Nato's defensive alliance has made clear there are no plans to send combat troops to Ukraine itself. Instead, they have offered advisers, weapons and field hospitals.
However, it has deployed several thousand troops in the Baltic states and Poland and for the first time is activating part of its much larger rapid reaction force. Nato will not say where but some could go to Romania, Bulgaria, Hungary and Slovakia.
At the same time, the West is targeting Russia's economy, financial institutions and individuals:
- The EU, US, UK, Japan and Canada are cutting off key Russian banks from the international Swift payment network, which allows the smooth and rapid transfer of money across borders
- Much of Europe has shut off its airspace to Russian airlines
- The US, EU and UK are imposing personal sanctions on President Putin and Foreign Minister Sergei Lavrov
- Germany has halted approval on Russia's Nord Stream 2 gas pipeline, a major investment by both Russia and European companies
- The EU has already targeted 351 Russian MPs and aims to limit Russian access to finance, technology and defence
- The UK says all major Russian banks will have their assets frozen, with 100 individuals and entities targeted; Russia's national airline Aeroflot will also be banned from landing in the UK
- The US is targeting 10 of Russia's biggest financial institutions
- The Russian city of St Petersburg will no longer be able to host this year's Champions League final and the Russian Grand Prix will not take place in Sochi.
What does Putin want?
President Putin partly blamed his decision to attack on Nato's eastward expansion. He earlier complained Russia had "nowhere further to retreat to - do they think we'll just sit idly by?"
Ukraine is seeking a clear timeline to join Nato and Russia's Deputy Foreign Minister Sergei Ryabkov explained: "For us it's absolutely mandatory to ensure Ukraine never, ever becomes a member of Nato."
Last year, President Putin wrote a long piece describing Russians and Ukrainians as "one nation", and he has described the collapse of the Soviet Union in December 1991 as the "disintegration of historical Russia".
He has claimed modern Ukraine was entirely created by communist Russia and is now a puppet state, controlled by the West.
President Putin has also argued that if Ukraine joined Nato, the alliance might try to recapture Crimea.
But Russia is not just focused on Ukraine. It demands that Nato return to its pre-1997 borders.
Mr Putin wants Nato to remove its forces and military infrastructure from member states that joined the alliance from 1997 and not to deploy "strike weapons near Russia's borders". That means Central Europe, Eastern Europe and the Baltics.
In President Putin's eyes, the West promised back in 1990 that Nato would expand "not an inch to the east", but did so anyway.
That was before the collapse of the Soviet Union, however, so the promise made to then Soviet President Mikhail Gorbachev only referred to East Germany in the context of a reunified Germany. Mr Gorbachev said later "the topic of Nato expansion was never discussed" at the time.
What has Nato said?
Nato is a defensive alliance with an open-door policy to new members, and its 30 member states are adamant that will not change.
There is no prospect of Ukraine joining for a long time, as Germany's chancellor has made clear.
But the idea that any current Nato country would give up its membership is a non-starter.
Is there a diplomatic way out?
Not for now. Ukraine has called for talks, but Russia says they can only be held on condition that Kyiv agrees to surrender and demilitarise, and that will not happen.
As well as the war, any eventual deal will need to cover the status of eastern Ukraine as wells as arms control with the West.
Image source, ReutersThe US had offered to start talks on limiting short- and medium-range missiles, as well as on a new treaty on intercontinental missiles. Russia wanted all US nuclear arms barred from beyond their national territories.
Russia had been positive towards a proposed "transparency mechanism" of mutual checks on missile bases - two in Russia, and two in Romania and Poland.
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