It was a Stuart. They should have brought the tank to the battle.
P.S. Stuart was the M3.
M3 was the first two models designation, primarily aircraft engines using High octane aviation fuel. With the M5 model switched to V-8 engines burning regular, plus other upgrades. Larger engines necessitated the raising of the upper rear deck, giving it a more box-like shape.
M5 Stuart[edit]
To relieve the demand for the radial aero-engines used in the M3, a new version was developed using twin Cadillac V-8 automobile engines and twin Hydra-Matic transmissions operating through a transfer case. This variation was quieter, cooler and roomier. Owing to its automatic transmission it also simplified crew training. The new model (initially called M4 but redesignated M5 to avoid confusion with the M4 Sherman[7]) also featured a redesigned hull with sloped glacis plate and driver's hatches moved to the top. Although the main criticism from the units using it was that the Stuarts lacked firepower, the improved M5 series kept the same 37 mm gun. The M5 gradually replaced the M3 in production from 1942 and, after the M7 project proved unsatisfactory, was succeeded by the Light Tank M24 in 1944.
(Above courtesy of Wikipedia.)
Many foreign versions were in service during the fifties and sixties. The French M5A1s participated in the Indo-Chinese campaign until 1954, and the Portuguese ones (only three) served in Angola in 1967.
(The Twilight Zone series is on Netflix, so now you've got me interested in the specific model. The M5A1 had a stepped back with raised rear, while the M5A3 had a straight line from front of glacis to rear.)
RCJ