During the 1936 peace maneuvers the tanks were installed under the tails of TB-3 bombers and landed during air landing exercises.
Infantry-tank battalions were issued 38 each. Airborne armored battalions were supposed to issued 50 each.
Based on experience in Finland, in 1940 experiments were carried out with the T-38 being a guide for a radio controlled T-26 explosives carrier. However this never got beyond prototype stages.
Some were used as immobile gun positions during the German invasion.
It was found that the T-38s were too lightly armored to even protect against machine guns. They were kept in combat as there was nothing to replace them.
T-38s used in the Winter War with Finland. Many were captured in 1941 and turned over to the Luftwaffe and used in the defense of airfields.
Defending the Motherland
The T-38 was used until 1942 despite very heavy casualties against the invading Germans.