Since February Russian troops have been battling with Ukrainian soldiers, and thousands of civilians have lost their lives.
Tensions have been brewing between the two nations since as far back as 2014, when the pro-Moscow Ukrainian government, led by Viktor Yanukovych, was overthrown. This led to fears in the Kremlin that Ukraine was moving into the orbit of the West, and Russian troops were sent to annex Crimea.
Since then President Putin has campaigned against Ukraine, and many other Eastern European nations, joined NATO (North Atlantic Treaty Organisation). He argues that Russia being surrounded by NATO members will be a matter of national security leaving Russia open to attacks.
READ MORE:
Key events so far:
24 February - Russia begins invasion of Ukraine with missiles launched at Kyiv and tanks and troops rolled across the border. President Putin claims this is a response to threats to Ukraine.
26 February - Then Prime Minister Boris Johnson pledges to take in Ukrainian refugees. People across the country, including in Liverpool, take to the streets to protest the war and show solidarity with Ukraine.
Roman Abramovitch releases a statement that he has handed the “stewardship and care” of Chelsea to the club’s foundation trustees.
1 March - Belarus joins Russia in invasion as troops cross the border into Ukraine. Fuel prices hit a new high with the average price reaching 149.22p per litre.
2 March - Kherson becomes the first major Ukrainian city to be captured by Russian forces. Chelsea football club is put up for sale.
8 March - Ukraine President Volodymyr Zelensky gives 'historic' Commons address to MPs via video link.
10 March - Chelsea owner and Russian-Israeli oligarch Roman Abramovitch sanctioned by British government. Boris Johnson rules out Ukraine no-fly zone despite Russia bombing maternity hospital. Peace talks are held in Istanbul, Turkey between Ukraine and Russia, with Roman Abramovitch present.
14 March - UK launches new refugee scheme encouraging families to put themselves forward to host Ukrainian families fleeing the war.
17 March - US President Joe Biden called Russian President Vladimir Putin a "war criminal" after Russian air strikes hit a theatre in the city of Mariupol where over 1,000 civilians were thought to be sheltering.
20 March - David Beckham hands over control of his Instagram account to a Ukrainian doctor working in Kharkiv, urging followers to donate to Unicef.
29 March - Concert for Ukraine is broadcast, with a line-up including Ed Sheeran, Ukrainian Eurovision winner Jamala, Snow Patrol, and Emeli Sande.
2 April - Pope Francis condemned Russian President Vladimir Putin for launching a “savage” war.
4 April - President Zelenskyy appears at the Grammys in a video filmed in his bunker saying music would "break through" the silence caused by the destruction of Russian forces across his country.
9 April - Boris Johnson makes his first visit to Ukraine and pledges to send 120 armoured cars and anti-ship missiles systems.
28 April - British national killed in Ukraine, suspected to be a volunteer fighting Russian forces despite pleas from the UK government for people not to sign up.
15 May - Kalush Orchestra win the Eurovision song contest with their song Stefania, which has become a popular anthem among Ukrainians during the war.
5 June - Ukraine's football team fail to qualify for the 2022 World Cup after losing to Wales 1-0. The team beat Scotland 3-1 on 1 June.
17 June - UK begin discussions to host Eurovision 2023 after Ukraine is ruled out. Boris Johnson makes second surprise visit to Ukraine.
28 June - Russian strike on Ukraine shopping centre described as "indiscriminate attacks on innocent civilians" and a "war crime".
25 July - Shortlist of seven cities, including Liverpool and Manchester, announced as potential host cities for Eurovision 2023.
24 August - Boris Johnson makes his last visit to Ukraine before leaving office, visiting Kyiv on Ukraine's independence day.
1 September - Zelenskyy appears on the opening night of the Venice International Film Festival, delivering a message in which he described the war in Ukraine as a 189-day-long horror film.
7 October - Liverpool is chosen as the host city for the Eurovision Song Contest 2023.
9 October - Ukraine attack Kerch Bridge, which links Russia to Crimea. Putin describes this as "terrorist attack".
10 October - Kyiv bombed for the first time in months by Russian forces.
READ NEXT:
- Nurse 'injected air into babies' and then searched victim's families on Facebook, jury hears
- DWP giving millions on Universal Credit and other benefits extra cash from next month
- Girlfriend accompanied drug dealer and kept his stock inside herself
- Liverpool hotel warning after Eurovision price hike
- CCTV shows murder suspects moments after Sam Rimmer shot dead
