I believe that I was mistaken about units ignoring the passive/stand ground command, provided the command was given before the enemy appears. However, through testing I may have discovered an issue. I found that aggressive units ignore passive/stand ground commands that are given after the units have decided to attack their own target. If my wording is confusing, here is an example: Aggressive unit spots villager Aggressive unit chases villager Unit is commanded to be passive Unit ignores command and continues to chase villager To work around this, you have to command the unit to walk to a different location, otherwise they will continue to chase their target even though I've pressed the passive/stand ground button.