A whirlwind of diplomatic efforts to stave off a Russian invasion in recent weeks failed to defuse tensions that had mounted over months.
Russia had been tightening its military grip around Ukraine since last year, amassing tens of thousands of soldiers, as well as equipment and artillery, on the country’s doorstep.
The escalation in the years-long conflict between Russia and Ukraine has triggered the greatest security crisis in Europe since the Cold War. Russia’s attacks on several parts of Ukraine raise the specter of a dangerous showdown between Western powers and Moscow.
So how did we get here? The picture on the ground is shifting rapidly, but here’s a breakdown of what we know.
What’s the situation on the border?
Several areas across Ukraine came under attack on Thursday morning after Russian President Vladimir Putin declared the start of a “special military operation” and warned of bloodshed unless Ukrainian forces lay down their arms.
Some of those forces began pouring across the border, crossing into Ukraine from the north in Belarus and to the south from Crimea, according to the Ukrainian State Border Service. Elsewhere, explosions rang out in multiple cities, including the capital Kyiv.
The territory recognized by Putin extended beyond the areas controlled by pro-Russian separatists, raising red flags about Russia’s intended creep into Ukraine.
Biden and European leaders have previously warned that Russia would suffer serious consequences should Putin move ahead with a wider invasion. But that has not stopped Russia from continuing to bolster its military positions.
In late 2021 and early 2022, satellite images revealed new Russian deployments of troops, tanks, artillery and other equipment cropping up in multiple locations, including near eastern Ukraine, Crimea and Belarus, where its forces were participating in joint drills with Moscow’s closest international ally.
What has set the stage for the conflict?
Ukraine was a cornerstone of the Soviet Union until it voted overwhelmingly for independence in a democratic referendum in 1991, a milestone that turned out to be a death knell for the failing superpower.
After the collapse of the Soviet Union, NATO pushed eastward, bringing into the fold most of the Eastern European nations that had been in the Communist orbit. In 2004, NATO added the former Soviet Baltic republics Estonia, Latvia and Lithuania. Four years later, it declared its intention to offer membership to Ukraine some day in the distant future — crossing a red line for Russia.
Putin sees NATO’s expansion as an existential threat, and the prospect of Ukraine joining the Western military alliance a “hostile act” — a view he invoked in a televised speech on Thursday, saying that Ukraine’s aspiration to join the military alliance was a dire threat to Russia.
In interviews and speeches, Putin has previously emphasized his view that Ukraine is part of Russia, culturally, linguistically and politically. While some of the mostly Russian-speaking population in Ukraine’s east feel the same, a more nationalist, Ukrainian-speaking population in the west has historically supported greater integration with Europe.
What does Putin want?
That type of historical revisionism was on full display in Putin’s emotional and grievance-packed address to the nation on Monday announcing his decision to recognize the Donetsk and Luhansk People’s Republics, while casting doubt on Ukraine’s own sovereignty.
But Ukrainians, who in the last three decades have sought to align more closely with Western institutions like the European Union and NATO, have pushed back against the notion that they are little more than the West’s “puppet.”
In fact, Putin’s efforts to bring Ukraine back into Russia’s sphere have been met with a backlash, with several recent polls showing that a majority of Ukrainians now favor membership of the US-led transatlantic military alliance.
In December, Putin presented the US and NATO with a list of security demands. Chief among them was a guarantee that Ukraine will never enter NATO and that the alliance rolls back its military footprint in Eastern and Central Europe — proposals that the US and its allies have repeatedly said are non-starters.
But less than a week later, after Russia’s upper house of parliament approved the deployment of military forces outside the country on February 22, Putin told reporters that the Minsk agreements “no longer exist,” adding: “What is there to implement if we have recognized these two entities?”
The agreements, known as Minsk 1 and Minsk 2 — which were hammered out in the Belarusian capital in a bid to end a bloody in eastern Ukraine — have never been fully implemented, with key issues remaining unresolved.
What is Ukraine’s view?
President Zelensky previously downplayed the danger of all-out war with Russia, noting that the threat has existed for years and that Ukraine is prepared for military aggression. But on Thursday, as Russia launched an assault on his country, Zelensky made an emotional address directly to the Ukrainian people, declaring martial law in the country.
“Russia began an attack on Ukraine today. Putin began war against Ukraine, against the entire democratic world. He wants to destroy my country, our country, everything we’ve been building, everything we are living for,” Zelensky said in a video message posted on his official Facebook page.
In Kyiv, where Ukrainians had continued to go about their daily business while Russian troops sat at their borders, the streets were empty on Thursday.
Ukraine’s government insists that Moscow cannot prevent Kyiv from building closer ties with NATO, or otherwise interfere in its domestic or foreign politics. “Russia cannot stop Ukraine from getting closer with NATO and has no right to have any say in relevant discussions,” the Foreign Ministry said in a statement to CNN.
Tensions between the two countries have been exacerbated by a deepening Ukrainian energy crisis that Kyiv believes Moscow has purposefully provoked. Ukraine views the controversial Nord Stream 2 pipeline — connecting Russian gas supplies directly to Germany — as a threat to its own security.
Nord Stream 2 is just one of myriad challenges facing Zelensky’s government. The former actor, who played a president on Ukrainian television, has had a brutal baptism of fire into real-world politics since assuming office in 2019.
His government’s popularity has stagnated amid multiple domestic political challenges, including a recent third wave of Covid-19 infections and a struggling economy.
Many Ukrainians are unhappy that the government has not delivered on the promises that brought it into power, including cracking down on corruption in the country’s judicial system. But the more pressing concern is Zelensky’s failure so far to bring peace to the country.