According to the In Game Information
Tasks: Defeat Heroic World Bosses from the Target List: 0/3
Repeatable - This mission can be repeated in the future.
Aid the Republic by defeating dangerous, high-priority targets on planets across the Galaxy. Surviving an encounter with these enemies will require a large, coordinated Operations group.
Defeat three Heroic World Bosses:
- Trapjaw (Tatooine, Level 30)
- Battledroid R4-GL (Nar Shaddaa, Level 32)
- Ulgo Siegebreaker (Alderaan, Level 35)
- Rogue Cartel Warbot (Quesh, Level 38)
- Snowblind (Hoth, Level 44)
- Primal Destroyer (Belsavis, Level 44)
- Gargath (Hoth, Level 49)
- Nightmare Pilgrim (Voss, Level 50)
- Dreadtooth (Section X, Level 50)