Defeat the Loyalist that are defending this location.
- Things will start with a few Loyalist War Beasts emerging from some vents along a side.
- After that, you will encounter Loyalist Legionaries.
- Defeating those Loyalists will cause a Cabal Dropship to appear over where you entered the area.
- From the dropship, you will encounter Loyalist Psions, Loyalist Gladiator, and Loyalist Centurion.
- More Loyalist Legionaries.
- Defeat them and then return to the opening area.
- Here you will encounter another Loyalist Psions and a Loyalist Centurion, and Loyalist Gladiators.
- Another dropship will appear, depositing a pair of Loyalist Colossus.
- You only need to defeat a few more Cabal before a hatch will open in the back.
- The fireteam just needs to drop into it to advance.