Cold War: What was it and how did it start?
It was a major part of the second half of the 20th century, ending with the collapse of the Soviet Union in 1991.
Russia
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Cold War -
Russia Russia Draws Troops Back From Drills Near Ukraine
The Russian defence minister ordered heavy weapons to remain near the border for another exercise later this year.
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Russia EU Estimates 100,000 Russian Troops Are Near Ukraine Border
European Union officials believe it would take only "a spark" to start a confrontation.
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Navy Navy Monitors Russian Warships Through Channel
Seven Russian Navy vessels and Algerian submarine sailed in opposite directions past the British Isles.
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News UK 'In Full Support' Of Czech Allies Hunting Salisbury Suspects
Czech police are looking for two men whose passports match the names of the suspects in the 2018 Novichok attack.
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Cyber UK And US Call Out Russia's 'Malicious Behaviour'
The National Cyber Security Centre said it is highly likely Russia gained unauthorised access to SolarWinds.
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Nato NATO Condemns 'Unjustified' Russian Activity Near Ukraine
The military alliance says Russia must "de-escalate immediately" but Russia says it is responding to threat from NATO.
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Russia Ukraine Military Says Soldier Killed By Artillery Fire From Russia-Backed Rebels
Attacks have intensified in recent weeks and Russia has built up troops along the Ukraine border.
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Russia Russia: Fears full-scale fighting could resume in Ukraine's east
The stark warning comes amid a build-up of Russian troops along the border of the country.
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USA US 'Increasingly Concerned' By Russian Troop Build-Up Near Eastern Ukraine
The United States Press Secretary said "Russia now has more troops on the border with Ukraine than at any time since 2014".
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Russia Russia warns NATO not to send troops to Ukraine
It comes amid a reported build-up of Russian troops near eastern Ukraine.
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Iran US And Iran To Begin Indirect Talks On Nuclear Accord
It comes almost three years after then-US President Donald Trump brought his country out of the deal.
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Nato NATO Fighter Jets Scrambled 10 Times To Intercept Russian Warplanes
NATO said there was "an unusual peak of flights", with Royal Air Force jets among those scrambled.
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RAF RAF Typhoons Scrambled To Intercept Russian Aircraft
Typhoons were launched from RAF Lossiemouth as the Russian jets approached the UK area of interest.
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Army Army Warned Over Troop Reductions Amid China And Russia Threat
Lord Richards said he supported plans to modernise the military but added it "can't be at the expense of conventional capabilities".
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Space Russia And China: Could New Base Plans 'Militarise The Moon'?
A space expert says the West must consider mutual exploration interests, after the two nations signed an agreement to set up camp.