The Decree of Aratos

"In the early summer of the year in which Agetas was strategos of the Aitolians (217 BC) [...] Aratos (of Sikyon) had found the mercenary forces of the Achaians disaffected and the cities not at all disposed to tax themselves for the purpose of maintaining them [...] (5) However, he made an appeal to the Achaians, and obtaining a decree on the subject, occupied himself actively with preparations for war. (6) The substance of the decree was as follows. They were to keep up a mercenary force of eight thousand foot and five hundred horse and a picked (epilektoi) Achaian force of three thousand foot and three hundred horse, (7) including five hundred foot and fifty horse from Megalopolis, all brazen-shielded, and an equal number of Argives." (Polybios of Megalopolis, Histories 5.91.1-8)

How to get it

It fires when at least 25 battles have been fought by Achaean League.

The game checks this at the end of every round.

What it unlocks

4 units can be recruited once it fires:

Unit	Who can raise it	Unit	Who can raise it	Unit	Who can raise it	Unit	Who can raise it
Achaian General's Bodyguard (Reformed)	Achaean League	Achaian Thorakitai	Achaean League	Argive Epilektoi	Achaean League	Megalopolitan Chalkaspides	Achaean League

Units already in your armies are converted:

Before	After
Achaian General's Bodyguard	Achaian General's Bodyguard (Reformed)

1 unit can no longer be recruited:

Unit	Who can raise it
Achaian General's Bodyguard	Achaean League