Chapter 3 Page 148 (Patreon)

From fantasy elves to an unstoppable magi-tech fascists, the elves underwent a change within 40 years. It did not happen overnight. 

Their first targets were the island nations that were their neighbors. These island nations were pirates and hermit kingdoms. Which is why most nations were taken by surprise when the continental lands were invaded.

The people of these island nations had black hair, which is why their half breed descendants look similar.