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Question about The “Age of Enlightenment” Expansion Mercenaries - How do the Mercenaries combine with the Storehouse, the Sacrificial Site, and the Arsenal?

Answer

The Mercenaries only take effect if other protective measures such as Storehouse, Sacrificial Site, and Arsenal have failed. The Mercenaries (partly) divest the brigands of what they have stolen.

Note: Sacrificial Site and Arsenal belong to the Age of Darkness expansion.