Legionary

Legionnaires are speculated to be a class of shield-bearing Cabal. While not confirmed, this would make sense because the shield carrying troops of the Roman Army were called Legionnaires. It is known that they at least sometimes fight alongside Centurions, which are speculated to be a more formidable class of Cabal.

Legionnaires are mentioned by Joe Staten in his interview with Official Playstation Magazine.

Speculation

 * Appear to employ heavy shields.
 * They seem to fight in squads.
 * They appear to carry assault rifle-esque firearms.