Voters headed to the polls in Russia on Friday for a three-day presidential election that is all but certain to extend President Vladimir Putin’s rule by six more years after he stifled dissent.

The election takes place against the backdrop of a ruthless crackdown that has crippled independent media and prominent rights groups and given Putin full control of the political system.

It also comes as Moscow’s war in Ukraine enters its third year. Russia has the advantage on the battlefield, where it is making small, if slow, gains. Ukraine, meanwhile, has made Moscow look vulnerable behind the front line: Long-range drone attacks have struck deep inside Russia, while high-tech drones have put its Black Sea fleet on the defensive.