There are 3 unique codex entries in the Achievement: Titles section on Hoth. 1 is accessible to all players regardless of class or faction and 2 are unobtainable.
Ice Wars Veteran was obtained from speaking with Admiral Revald during "The Null Cannon" mission. It is unobtainable.
Codex type: Achievement: Titles | Faction: Republic | Class: All
Associated Achievement: None
Of the Bane Brigade was obtained from speaking with Captain Graich during "Revenge of the Bane Brigade" mission. It is unobtainable.
Codex type: Achievement: Titles | Faction: Imperial | Class: All
Associated Achievement: None
Truth Seeker is obtained during "Trial by Fire" dynamic encounter.
Codex type: Achievement: Titles | Faction: Both | Class: All
Associated Achievement: Truth Seeker