At the start of the Reef Wars, Hallam Fen was the protégé of Paladin Imogen Rife. When Imogen Rife's fleet was assaulted at Pallas by Pirsis in an attempt to free Drevis and Kaliks-4, Hallam Fen stopped an attack on the Awoken base where they were being held and captured the leader of the assault, Weksis, the Meek.
Fen then managed to open communication with the rest of the Reef and devised a plan to break the siege. With the help of the Crows and the Techeuns, they created an illusion of a Harbinger fleet headed to Pallas. As the Wolf fleet fled, Hallam Fen, Kamala Rior, and Leona Bryl captured Pirsis and transported the captive Wolves to Vesta.
As thanks for his service, the Queen granted Hallam Fen the position of Armada Paladin in place of the fallen Imogen Rife.