Against all tanks heavy Armoured piercing shells are used to penetrate their thick armour. However against Japanese Chi-Ha tanks this was rarely used, instead High explosive and Incendiary rounds were used instead, why?
The Chi-Ha had heavy armour which made armour piercing rounds ineffective
The Chi-Ha had very light armour which made armour piercing rounds ineffective
The Chi-Ha had a Bamboo deflector which stopped explosions but could not stop heat
The Chi Ha was too fast for the armour piercing rounds