Kill Balaur soldiers at the base.
Step 1. Eliminate the 'Silona Vanguard UnitA unit consisting of Silona Vanguard Combatants, Silona Vanguard Sentrys, Silona Vanguard Supervisors, and Silona Vanguard Riders. It appears when the Elyos or Asmodians capture Silona Cascade Overlook. The one consisting of Silona Vanguard Combatants, Silona Vanguard Sentrys, and Silona Vanguard Supervisor appears when the Balaur capture Silona Cascade Overlook. (x5).
Step 2. Talk with HomerusA captain of the Guardian Detachment who appears when the Elyos capture Silona Cascade Overlook..