Translator: Pika

  The River Patrol Army was originally set up as a preventative measure against the river flooding. If the river floods, then they need large amounts of manpower to repair the dike. There was also a need of laborers to cut out canals for ease of transportation.

  Eventually, as the transportation system developed, the River Patrol Army also assumed the role of ensuring the safety of the trade route along the river. They were in charge of exterminating some wild b..