Crusader

"Crusaders? Sounds like these guys are back then from the Crusade times in 11th century Middle East, and they came from Europe. Now Erathia's got these type of Crusaders, but then... they just got modernized... in a flash."

--Su Ji-Hoon, Nothing Can Stop the Crusader Corps

Crusaders are elite soldiers of the Erathian Union and all of them are part of the Crusader Corps.

In that video game, Heroes of Might and Magic III, they were normal crusaders because they use swords and shields, but now in this series, they can now use assault rifles, swords, riot shields, pistols, and grenades.