However, in 1939 during the Battles of Khalkhin Gol (Nomonhan) against Soviet BT Tanks, the gun proved to be insufficient against the Soviet armor, causing the Japanese Army to have heavy tank losses.
In the context of the Battles of Khalkhin Gol (Nomonhan) in 1939, the gun's performance against Soviet BT tanks was a significant factor contributing to heavy tank losses for the Japanese Army.