The Storm Isle Dynasty is located in the very north of the Eastern region. Due to its past, the Storm Isle Dynasty's territory is way bigger than it looks. Autumnming Islands is a group of 4 islands located more than 110 km from the Storm Isle Dynasty. These four islands are located 20 km away from the mainland.
In the past, back when many Kingdoms and Dynasties existed in the Eastern region, the Storm isle Dynasty had a big conflict with the Nepoca Kingdom of the past. The Nepoca Kingdom knew that they cannot fight the Storm Isle Dynasty so the past Nepoca King hence surrendered the Autumnming Islands to the Storm Isle Dynasty to resolve the issue.