In a New Year's Eve message usually aired at midnight, which has already been shown to Russians in the Far East, Putin said that love for the motherland was what ensured that the Crimean peninsula joined Russia in March after a controversial referendum.
"It fully revealed itself in the brotherly support of the residents of Crimea and Sevastopol when they firmly decided to go back home," Putin said.
"This event will forever remain a most important milestone in our history."
These events fuelled Western sanctions against Moscow and were followed by the ongoing bloody conflict in eastern Ukraine.
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"As we review the passing year, I would like to sincerely thank you for unity and solidarity, for the deep feelings of truth, honour, justice and responsibility for the fate of your country, for the unfaltering readiness to defend Russia's interests," Putin said.
He added that Russia staged the "best Winter Games in history" in Sochi, where the Olympic dream "came true" in February and Russian athletes took first place.