In a trailer shown yesterday for an upcoming documentary on state-run Rossiya-1 television called "Homeward bound", Putin openly discusses Moscow's controversial grabbing of Crimea a year ago.
Putin recounts an all-night meeting with security services chiefs to discuss how to extricate deposed president Viktor Yanukovych, who had fled a pro-Western street revolt in the Ukrainian capital Kiev.
"We ended at about seven in the morning," Putin says. "When we were parting, I said to my colleagues: we must start working on returning Crimea to Russia."
The military operation was initially kept secret and despite the increasingly obvious actions of unmarked Russian forces on the ground, Moscow insisted that only locals were involved in the upheaval. Later, the Kremlin conceded that it had been behind the power grab.
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In the trailer for the documentary, Putin also claims that Russia's military was ready to fight its way into the eastern Ukrainian city of Donetsk to get Yanukovych, a heavily corrupted but loyal figure who favoured keeping Ukraine in Russia's sphere of influence.
Yanukovych later resurfaced in the southern Russian city of Rostov and has not been back to Ukraine.
More than 6,000 people have since been killed in fighting between Ukraine's government forces and heavily armed separatist militias based in Donetsk and backed - according to Western governments - by Russia, although Moscow denies this.
Rossiya-1 did not say when the full documentary would be aired.