The Hidari Wars
Within Kirinai Island there is a clan whose mastery in magic is far superior to that of any other. They openly seek out magic users for their military while not all of their military is comprised of magic users it uses about five times as many magic users as any other military in the Mizari Islands. Currently the Mahou clan is a vassal of the Ayame clan, and they are at war with the Oukan clan who used to rule over all of Kirinai Island. Unfortunately for the Oukan they lost their greatest power when their mages wanted to once again be reunited with the remainder of the Mizari Islands.
The Mahou clan Daimyo is the recently renamed Mahou Osamu. Osamu used to be known as Yamamoto Osamu, but renamed himself when he was elected to be the daimyo of the new Mahou clan. Unfortunately while originally wanting the ability to rule the entirety of the Mizari Islands Osamu quickly reconsidered seeing as his clan was still fairly small compared to what would be needed for conquering the rest of the Mizari Islands. He quickly took the opportunity to become the vassal of the much more powerful Ayame clan, and decided it would simply be best to allow the Yami clan to rule the entire Mizari Islands so long as he can rule a good portion of Kirinai.
Mahou Samurai know both the way of the blade, and the studies of magic. Unfortunately to simply have an entire army comprised of Mahou Samurai would require all of the magic users of the Mizari Islands so Mahou Samurai make up a small portion of the Mahou clan military.