In the army, attacking exercises were the most basic exercises.
A simple description is a warrior attacking straight ahead with a weapon in hand.
Spears and swords were thrust, while sabers and axes slashed, and a hammer smashed.
For a warrior, the weight of the weapon was nothing. Training by using a weapon to simply attack had little effect.
Hence, they had to use a target to test their attack's power.
An effective attack was to pierce through armor. Only an attack that could break through an enemy's steel armor was threatening.
In an army like the Black Turtle Army, the attack target was made of metal. The metal used was ordinary iron, but for most soldiers, that was enough.
But in the Tai Ah Divine City, things were different.
With the attack power of the Tai Ah Divine City warriors, an ordinary thick iron plate would be easily pierced with a fine weapon. It would be no different than a normal person chopping wood.