Increased Weapon Production
To build a community, one must gather a number of like-minded individuals to start the community. Next on the list would be a stable source of food. Then, trade follows.
The more than seven thousand survivors residing in towns managed by Black Haven finally had their fixed roles. They have their own roles that help support Black Haven. Even if one was on an opposing faction, just using and buying anything will cause the cycle of commerce to further solidify the community's foundation.
One would do their job, get rewarded, then buy what they need. Afterward, the cycle would be repeated and the economy would flourish.
After several community trades and accepts each other, society would be born.
Community has its own physical existence but society exists only in the minds of individuals who constitute it.