User blog comment:Sir Koji: White Knight/Epic Plans/@comment-1462633-20110328000622/@comment-1639880-20110328211533

Right now it's looking like they were active in the past as a private military group, or a military group that simply tried to fight off opposition, but not truly defend the island. As such, Ishiza had the island revamped to include a public police force, while this force was persecuted since Ishiza couldn't control them; they went into hiding, or retirement, or something. Some probably joined this new police unit. Then they decided to come back, possibly now under Ishiza's control (very likely, considering the difference; from swords and spears and the like to heavier weaponry).