Who gets it: Epirus

Hail, Basileios! Over time, our soldiers have encountered and slain many foes. Among the barbarians we faced in Italy, we found cavalrymen hiding behind shields. Even if this practice was initially regarded as pure cowardice by our brave and noble warriors, over time we have come to see the merits of equipping our horsemen with an Aspis of their own. These new military strategies are represented by the Aspidophoroi, who have now become available for recruitment.

It fires when a settlement held by Epirus is a huge city or larger.

The game checks this at the end of every round.

1 unit can be recruited once it fires:

Unit	Who can raise it
Aspidophoroi	Free Peoples

1 unit can no longer be recruited:

Unit	Who can raise it
Xystophoroi	Free Peoples