The Akkadians are sea faring warriors/explorers from the islands off the north west coast. They live a harsh life due to the environment. The are master sailors and ship builders. They used these skills to set up villages along coast.
The Akkadians were the last to be conquered by the Pellans. Their last war chief seeing that continued resistance would bring an end to his people surrendered. After being absorbed they started exploring further than ever before. They set up colonies on the small islands in the inner sea. And for the first time started trading with Assyrians and Adena.
The Akkadians have maintained a semi hostile relationship with Pellans. Even though over the past centuries under their rule the Akkadians standard of living has improved.
DM note the Akkadians are Norse Vikings.