Pfeffersack
Deity
Units don't have Era tags as such, but belong to the Era of their Prereqs. Starting units like the Warrior and it's replacements are NULL, but are coded as Ancient Era.
**Edit**
I didn't read this earlier, but yeah this is an old bug. Agoge works properly with Ancient Era starts, but not Classical Era starts with units that have a NULL prereq.
I searched the bug forum and don't find any report for it, so I took the freedom to create one:
https://forums.civfanatics.com/thre...rking-on-gaesate-in-classic-era-start.663303/