When word arrives in Kyiv that Putin is sending in the entire complement of new T-14 Super Tanks, the Zeroes are sent to deal with them, using the newly-arrived NATO tanks.
The Zeroes maneuver carefully as they approach the Russian staging area, but confusion sets in as none of the new tanks even leave their revetments. The Zeroes quickly outflank and destroy the entire unit.
When they capture a Russian and interrogate him, they discover that, after the Russians pulled the tanks forward into their parking places, they were then stuck, unable to back out, as Putin had declared that Russian Tanks Shall Never Be Driven In Reverse.