1) The message "recruitment blocked", what does that mean?

In order for a unit to get new recruits there must be an open route of supply lines from its location back to its home city.

2) The only way to increase recruitment pools are through migrants? Is that right?

Yep, the only way to increase the max recruits in a city is to settle a band of migrants in the city. This only applies to Macedonian cities in the Philip of Macedon scenario. Otherwise, recruits in a city replenish slowly over time in proportion to the size of the city. Disbanding slaves into a city will also add a small number of recruits.

3) My southern-most city right now, Elemia, is always out of food ...

Upgrading the supply lines is a good start but this only works if Elimea has extra food and its stockpile level is set low enough that it will share that food. Alternatively you can also capture and move sheep into Eordea or have workers or slaves pickup food from a city and walk it to Eordea.


Hope that helps.