Tired of having to wait for your barracks to finish?,
Don't have enough steel for those last 25 soldiers?,
Too short on grain to make cavalry?,
Come visit Mark's Merc's, we have mercenaries for all occasions.
On with the serious bit
You have all these mercenaries all over the islands you fight all of the time,
but why not hire mercenaries yourself?
Ricardo's Recruits, Ricardo (standard general) 100 recruits, 100 bowmen (or their bandit equivalent names).
For example, buy him at the Mercenary camp (new building), and send him off to your adventure to help alongside your regular troops.
Costs would off course be such that it's cheaper to train your own men, but when your short on time or need an extra boost
mercenaries would be a welcome sight.
I'd welcome thoughts of my fellow Settlers ^_^