Ukrainian volunteer forces have been using a captured T-80 tank nicknamed "Bunny" against the Russian army.

The tank was built two years ago and was controlled by Russian forces until March of this year.

Alex, a former software engineer who used to live in the second largest city of the country, said he found an abandoned tank in a field just eight days into his mission.

This is my personal tank. Alex told Kiley in an interview that he is the tank commander and tank owner, and that the tank can shoot more advanced, better rounds.

Two dozen Russian military vehicles and several tanks were destroyed by Bunny in March.

The New York Times reported that Ukrainian and Western officials said earlier this week that Russian forces were leaving the region. The Russian army had retreated from Kyiv in April. The UK defense officials cited Russia's inability to capture key Ukrainian cities as the reason for the withdrawal.

The Ukrainian Defense Ministry hosted a parade featuring captured Russian tanks and mocked Russia's annual military celebration in Moscow.

Russian President Vladimir Putin did not mention a declaration of war in his address during the Russian Victory Day celebration on Monday, despite warnings from Western officials.

The West was preparing for the invasion of Russia. Tensions were created at the borders by NATO. They didn't want to hear about Russia. They had other plans, Putin said in his speech.