US President Donald Trump's summit on Friday with his Russian counterpart Vladimir Putin is the latest in a series of diplomatic efforts to end the war in Ukraine since his return to the White House:
'Make a deal'
While campaigning, Mr Trump had promised to end the Ukraine war in "24 hours".
On 20 January, newly inaugurated, he declared that his Russian counterpart, Mr Putin, "should make a deal" with Ukraine and then threatened Russia with sanctions.
On 12 February, Mr Trump said he and Mr Putin had agreed to start "immediate" talks on ending the Ukraine conflict.
Washington said Ukraine's ambition to join NATO and to return to its pre-2014 borders, before the Russian annexation of Crimea, was unrealistic.
Ukrainian President Volodymyr Zelensky urged his European allies not to back any accord struck by the US behind the backs of Kyiv and Europe.
US and Russian foreign ministers held talks in Riyadh on 18 February, the first at that level since the Russian invasion of Ukraine on 24 February 2022.
Trump-Zelensky row
In early February, Mr Trump said he wanted to negotiate a minerals deal with Ukraine that would give the United States access to its natural wealth, in compensation for US economic and military aid already delivered to Kyiv.
On 15 February, Mr Zelensky refused to sign a first US proposal; four days later, Mr Trump lashed out at the Ukrainian leader, going as far as calling him a "dictator".
On 28 February, in a spectacular public clash with Mr Zelensky at the White House in front of television cameras, Mr Trump accused him of having "disrespected" the United States and threatened that if he did not make peace with Russia ", we're out...".
On 3 March, Mr Trump suspended military aid to Ukraine and the sharing of intelligence.
Mr Zelensky made conciliatory gestures to Mr Trump.
The 27-nation EU on 6 March approved a plan aimed at mobilising up to €800bn over four years to boost security on the continent and help Ukraine.
Putin sets terms
Washington agreed to lift restrictions on military aid and intelligence sharing, after on 11 March, Ukraine and the United States agreed a plan for a 30-day ceasefire with Russia.
Mr Putin accepted a 30-day truce, but only on attacks on energy infrastructure. Both sides traded accusations of breaches.
On 25 March, after talks in Saudi Arabia, the White House announced an agreement for a truce in the Black Sea, but Russia set new preconditions.
In April, Russia carried out more deadly strikes.
Mr Trump showed increasing signs of impatience, accusing Mr Zelensky of compromising the talks by refusing to recognise Russia's sovereignty over annexed Crimea.
He also expressed doubts over Mr Putin's will to end the war.
Minerals accord
After weeks of negotiations, on 30 April, Washington and Kyiv signed a deal giving US companies access to Ukraine's natural resources and creating an investment fund for reconstruction.
As Russia intensified its attacks on Ukraine, Mr Trump said on 26 May that Putin had gone "crazy" and is "playing with fire".
In mid-June, he said he is as disappointed with Ukraine as with Russia.
Ultimatum to Putin
In early July, Washington announced a suspension in its deliveries of some arms to Ukraine, citing concerns over a decline in its own ammunition stocks.
Less than a week later, Mr Trump said he was unhappy with Mr Putin's stance and promised to send more "defensive" weapons to Ukraine via NATO.
After several fruitless rounds of talks in Turkey, Mr Trump gave Mr Putin 50 days to end the war or face tough sanctions, an ultimatum which was then reduced to 10 days and supposed to expire on 8 August.
On that day, Mr Trump said he will meet Mr Putin on 15 August in Alaska to talk about an end to the conflict, saying it will involve an exchange of territory.
Meanwhile, US-Russia tensions soared.
Mr Trump announced the deployment of two nuclear submarines after what he said were provocative declarations by former Russian president Dmitry Medvedev.
