One theory:
After the sea level rose and the fight for survival began, the people formed different tribes. These ten people were the leaders of each tribe and were searching for ways to invade other tribes and take their resources. They settled in different parts of the world where they started to rebuild civilization. However, since all the leaders had different talents, each grew on different ways. Bhurt specialized in building cannons. Mortimer in mortars. Swift in speed and carronades. Isak in ice and grenades. Feeliz in repair. Brock in shields and firebombs. Sinklair in torpedoed and bandages. Brunice in fire. Balastian in mines, missiles, and triple torpedoes. And Dr. Buzzkill in electricity. However, they knew they could not win the fight alone, so they formed allies. Bhurt teamed with Mortimer. Swift teamed with Sinklair. Isak teamed with Brunice. Feelix teamed with Dr. Buzzkill. And Brock teamed with Balastian. Then each team built their own machines of destructions, which came to be the ships of Battle Bay. Ever since, they have been training and training to overcome their rivals.
Yes, this sounds ridiculous, but I'm going to compare it to Greek mythology to make myself feel better
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