Tensions are high, but a Russian invasion is highly unlikely.
Seven years on the causes of the war in Ukraine remain disputed. So it's important to look at a timeline of events.
Despite a fresh approach from the White House, internal issues make it unlikely that conflict in eastern provinces of Ukraine will end in 2021.
A conflict frozen in time seems a possible outcome after a reshuffle of top officials in Ukraine and Russia.
Ukrainians may grudgingly accept compromise plan to resolve separatist conflict, but in so doing they could hand Russia a wedge to drive between them and the West
A complex mix of domestic and foreign issues is putting pressure on the new government of Volodymyr Zelenskiy.
What do the people of the Donbas want for their future?
What is the 'Steinmeier formula' for eastern Ukraine and why is it so controversial?
The fallout for President Trump from his conversation with Ukrainian President Zelenskiy was swift and harsh. The consequences for Zelenskiy and his country could also be serious.
How Ukraine has reacted to controversy over a phone call between its President Volodymyr Zelenskiy and Donald Trump.
Newly inaugurated as president, Zelenskiy is now preparing to fight a parliamentary election – while Russia and the West look on.
At worst, more lethal aid could escalate the conflict further. At best, it will continue to keep alive a conflict that has already claimed more than 10,000 lives.
Five years after Crimea returned to Russia, the east-west stalemate over Ukraine is far from stable.
Four peace agreements have been struck to try and keep Ukraine on an even keel, but none of them has resolved the conflict's fundamental problems.