Russian troops fleeing Ukraine’s battlefield advances are leaving behind heavy weapons, including modern T-90 tanks Russia counts among its best main battle tanks, and the Ukrainian armed forces are putting them back into the fight, Kyiv’s military said.

“Thanks to the generosity of the russian federation, the first batch of new T-90A tanks entered into service with #UAarmy,” Ukraine’s defense ministry said on social media Thursday, mockingly calling the move “particularly generous because at the same time the ruscists are launching a program to restore 60-year-old T-62 tanks for their own armed forces.”

Russia has touted the T-90, a modern weapon born out of a T-72 modernization program in the final years of the Soviet Union that has been upgraded repeatedly over time, as one of the most advanced tanks in its arsenal, but even with capable tanks, Russian armor forces have faced setbacks and substantial losses in Ukraine.

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Russian forces have lost lots of modern equipment throughout the devastating war in Ukraine and have been forced to pull old and obsolete tanks — like the T-62 referenced by Ukraine’s military — from storage. The T-62 is a Soviet-era main battle tank that was eventually replaced by the T-72 and can be seen on display in some museums.

Read more: yahoo