The Operation Hammer of Dawn ended in the victory of the United Navy. The island of Crescere was cleansed of magibeasts, bringing about human dominance over its entirety. Though, it wasn't without a price.
Fortunately, however, the price wasn't in the form of naval personnel's lives. It was merely resources, which was used as the fuel of the special operation.
But as said before, the special operation was paramount for the stability and survival of the United Navy. It was something that needed to be done. Otherwise, the United Navy will be heading to eventual collapse.
After all, they wouldn't be able to exploit the natural resources of the island, making their supply continue to be net-negative.
With the ensured authority of the United Navy over Crescere, they would have no worries about building anything they wanted. They wouldn't need to be anxious about random assaults happening throughout their forces on the island.