Knight Astlin can be found behind a table in the recruitment office inside the National Guard training yard.

Knight Varham's Battlefield holotape is located in a ruined house north of Relay tower 0MC-810, south of Med-Tek Research and east of West Everett Estates. To complete the objective, the Survivor must loot holotapes from the fallen soldiers, then play them from their Pip-Boy. Each beacon leads to the final resting place of a Brotherhood of Steel soldier, revealing the fate of their reconnaissance team.

However the quest is acquired, the Sole Survivor will need to trace the sources of three distress signals. Alternatively, the Pip-Boy may detect one of the emergency distress beacons while exploring, automatically activating the quest. The Sole Survivor can be given The Lost Patrol by speaking to Paladin Danse or Lancer Captain Kells after completing Call to Arms but before triggering Shadow of Steel. This quest can be initiated in one of three ways.