A well-structured city hall should have dedicated personnel managing all aspects of the city, but Dawn City could not achieve that level of completeness yet.
Neither could there be such a luxurious allocation of personnel, so he temporarily divided Dawn City into three parts.
Externally, raiding the population and trading with Green City.
For a long period in the future, raiding the population would be the main direction of Dawn City.
Dawn City was located deep within the Far Mountain Range, disconnected from the outside world. Even flying Demon Beasts would have a hard time getting in, so population could only be increased through raids for a long time.
Relying on reproduction to expand the population might take decades, which Lide could not afford to wait.
As for trading with Green City, it was more about unilaterally acquiring various living supplies. The current Dawn City had no production capacity and could not engage in equal trade.