In February 1940, as the Soviets had managed to break through in the Western Karelian Isthmus the Finnish had to use every opportunity to slow them down and prevent them from advancing into Southern Finland and Helsinki. In Näykkijärvi, south-east from Viipuri (Vyborg) a battle, only one of its kind during the Winter War and today often forgotten, was fought on February 26th. This was the first and only time the Finnish tanks were used in battle during the Winter War.
Counter-attack was carried out by strengthened 3rd Jäger Battalion supported by group of Vickers 6-ton tanks. Finnish tank armament in the Winter War was almost non-existing, as the French FT-17's (bought in 1919) had become obsolete and later the Vickers tanks had been bought without communications, optics or even guns in order to save money.
The battle didn't end well for the Finns. Out of original 13 tanks, 7 were lost due engine failures before the battle and one got stuck in a ditch and had to return damaged. The remaining 5 were knocked out in the desperate battle against Soviet T-26 and T-28 tanks and anti-tank guns. The Finnish unsuccesful attack was stopped. Soviet tanks losses remain uncertain, but 3 were recorded.