The move, prompted by Russia's invasion of Ukraine, would end more than two centuries of military nonalignment.

Sweden joins Finland to seek Nato membership despite Russian threat

Finland President Sauli Niinisto announced his country's intentions - a move that could anger neighbour Vladimir Putin.

Finland formally confirms plans to join Nato despite threats from Russia

Without a win in Ukraine, Russian President Vladimir Putin risks becoming a defeated monster with a nuclear weapon, writes US Correspondent Emma Murphy.

NATO leaders to meet as Russia refuses to rule out use of nuclear weapons

Soldiers are having their tours extended, more military hardware arrives daily and the message to President Putin is clear - NATO is defending the border.

What is Nato's presence in European countries bordering Russia?

Russia's invasion of Ukraine has reached its third day -  but are President Vladimir Putin's troops winning? The overall picture is murky and confusing. 

Is Putin's military gamble paying off?

Article 5 of Nato's founding treaty is central to the alliance's existence, but it has not been invoked to defend Ukraine.

What is Nato's Article 5 and what does it mean for Russia-Ukraine conflict?

Ukrainian and US officials have been sounding alarms about a build-up of Russian troops along Ukraine's border for months.

Is Russia preparing to invade Ukraine and would NATO defend it?

160222 Ukraine solider fires anti-tank weapon, AP  

While Russia has said it will withdraw some of its troops from near the Ukrainian border, it might not be the de-escalation world leaders had been hoping for.

Leaders wait for Putin's next move and whether it will make war more likely

A Russian government spokeswoman sarcastically asked Western intelligence to let her know when Russia would invade Ukraine so she could plan her holidays.

'Little evidence' Russia has pulled back from Ukraine border, says Johnson

Photographers underneath a United States Air Force (USAF) B-52 bomber during landing at RAF Fairford, as tensions remain high over the build-up of Russian forces near the border with Ukraine. Picture date: Thursday February 10, 2022. Ben Birchall/PA

Watch as the US Air Force's aircraft land at the RAF base in Fairford, Gloucestershire.

American B-52 bombers arrive in UK amid fears of Russian invasion of Ukraine

Boris Johnson warned Russian president Vladimir Putin that invading Ukraine would backfire and only serve to strengthen Nato.

PM insists UK 'will not flinch' over Ukraine as he issued warning to Putin 

NATO General Secretary Jens Stoltenberg said there was "no room for miscalculation when it comes to NATO's willingness and commitment to defend all allies."

NATO 'Hopes for the best but preparing for the worst' amid Russia tensions

The Russian president warned Nato against further expansion.

Vladimir Putin accuses US of 'standing with missiles on our doorstep' 

Sergey Lavrov announced the move in response to last week's expulsion of eight members of Russia's mission to the military alliance by NATO.

Russia suspends NATO mission following expulsion of 'intelligence officers'

A NATO spokesperson said: "We have strengthened our deterrence and defense in response to Russia’s aggressive actions".

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