Before this patch added crush armor as forge techs. I thought it was better to rework and make technologies more objective.
Currently we had 4 technologies, two for infantry and two for cavalry. All give armor against pierce and hack.
What the patch does is divide the technologies into pierce for one type and hack armor for another, Both affecting soldiers.
That way the player is free to choose the best type of technology for the moment.
Cost are lower compared to the current values, but high value of metal.
Icons according to the description.
I plan to change the techs attack also to just 4 techs of the same format.
EDIT
Crush armor removed.