I have made an executive decision with my fantasy series. I decided to introduce three new kingdoms to my fantasy world. In terms of armor and weapons, these kingdoms will be similar to 13th century Ireland, England, and Scotland. In terms of culture, they will be similar to Dark Ages Scandinavia. When these kingdoms come in contact with the main empire, it will be like when 9th century England was raided and invaded by Vikings. While the empire has an advantage with its dragons, these new kingdoms will have more sorcerers. Based on these factors, this conflict will be even with one side having an equal chance to win over the other.