The harbour of the Koula city was truly a majestic sight. There were over a hundred docks and several hundreds of ships on the harbour. Most of the ships were mercantile vessel ships but there were some ships built for fighting here and there too. The merchant ships needed the protection of these fight capable ships to stay safe on the sea.
The sea area around the city did not have many monsters or dangerous marine life but the sea route was long and danger could be found in most of the areas. So having a strong fight capable of escorting them was essential for the merchants. The pirates were also a problem.