This technology is the equivalent of "Supplying" and English description is very misleading also.
It replenish part of actual battle loss, same as "First Aid". (Do NOT heal during battle) ( recover 0.5% of troops per tech lv)
It's just another technology that does the same thing as First Aid: saves you crops.
It does not help in Legions, dungeons, farm battle, area battle, etc. It just save you crops by reducing troop loss, nothing else.
You do not need to max techs that you get after lv 70 unless you have enough laurels.
It replenish part of actual battle loss, same as "First Aid". (Do NOT heal during battle) ( recover 0.5% of troops per tech lv)
It's just another technology that does the same thing as First Aid: saves you crops.
It does not help in Legions, dungeons, farm battle, area battle, etc. It just save you crops by reducing troop loss, nothing else.
You do not need to max techs that you get after lv 70 unless you have enough laurels.