Russia is gearing up to celebrate the one-year anniversary on Monday of Crimea voting to leave Ukraine and join the Russian state in a takeover blasted as illegal in the West but seen at home as a triumph for Vladimir Putin.
The hastily organised March 16, 2014 referendum - which Putin now admits came well after he'd already taken the decision to seize the Black Sea peninsula from Kiev - kickstarted a bloody separatist conflict in eastern Ukraine and sent Moscow's relations with the West into a tailspin.
The move struck a deep chord with Russians, however, cementing Putin's 15-year grip on power as his approval ratings have continued to climb in the past year, hitting a record 88 percent, according to figures released last week.
This played well with Russians who are themselves in increasingly nationalist mood, but was blasted in the West and by Ukraine as an aggressive land grab.
Moscow will hold a concert on Wednesday near the Kremlin themed "We are Together".
But the celebrations cap a tough year for Crimeans who have become increasingly isolated after Kiev cut train and airline services to the peninsula, leaving an unreliable ferry to Russia as their sole link to the outside world.
However while many young Crimeans or those who identify as Ukrainian have left the peninsula, complaining about a climate of fear under Russian rule, a poll this month showed 82 percent of residents support joining Russia. Only four percent were opposed.
'Prepared for the worst'
Days after Kiev's Russian-backed government fell to pro-Western protesters, unidentified gunmen, later revealed to be Russian soldiers, fanned out across the province to support locals declaring independence from Ukraine.
Just weeks later on March 16 the controversial referendum was held and 97 percent of Crimean residents opted to return to Moscow rule, according to the official results, and two days later Putin signed the annexation treaty.
Ukraine and Western capitals denounced the referendum as a sham.
Putin says in the documentary he was willing to put Russia's nuclear forces on alert in case the West tried to intervene militarily.
Russia was ready to face "the worst possible turn of events", he added.
Putin described sending thousands of land, air and sea troops to Crimea, including special forces, to neutralise about 20,000 Ukrainian troops on the peninsula.
"We turned Crimea into a sea and land fortress," he said, adding the aim was to give people an opportunity to choose their own future.
Soon after the annexation, pro-Russian separatists surfaced in eastern Ukraine, taking on the weak Ukrainian army and carving out a swath of territory where they held their own unrecognised independence votes.
The Kremlin denies arming the rebels and sending Russian troops to fight a conflict that has since left over 6,000 dead, according to UN figures.
However Putin insists his actions in Crimea prevented the kind of violence now seen in eastern Ukraine.
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