So basically what I wanna do is: that as soon as you research Feudalism, that my unique Unit, (which is a Skutatoi) is spawned upon founding a city with a settler. This should go on until Replacable Parts is researched. After that no units should spawn. Some advice would be nice. Normally I try to base my modifier/units on other creations, but I found nothing similar yet. I have a very very basic understanding of SQL (which I am using) but a bit overwhelmed by all the modifiers.