The Spanish Civil War showed that tanks armed only with machine guns were ineffective and an improved model--the M2A4--was produced with a 37 mm gun as the main armament.
This led to the the M2A4 with a 37 mm gun as the main armament. The Spanish Civil War showed that tanks armed only with machine guns were ineffective.
The Spanish Civil War showed that tanks armed only with machine guns were ineffective. This led to the the M2A4 with a 37 mm gun as the main armament.
The Spanish Civil War showed that tanks armed only with machine guns were ineffective. This led to the the M2A4 with a 37 mm gun as the main armament.