Early Life and Career
During his time on Solaris, he was a part of the stables of Allards arch-enemy, Philip Capet. Armstrong was killed by Justin Allard when he refused to eject from his battered Griffin. As Allard was considered by the general public to be a traitor to the Federated Suns, Peter Armstrong became a virtual martyr and his daughter was treated appropriately.
It was during this period that Diedre Armstrong began developing a deep hatred for Justin Allard. When it was later revealed that Allard was a deep agent working for the Federated Suns, Peter Armstrong was dishonored. At best, Armstrong was thought of as a stooge trying to prevent the heroic Allard from completing his mission, or at worst a traitor to the Federated Suns himself. Deeply ashamed, Diedre Armstrong changed her surname from Armstrong to her mother's, Lear and in time became a medical doctor.
Service in the AFFC
As she grew up, Diedre embraced a disdain for all things martial, particularly 'Mechs. Despite this, she enlisted in the Armed Forces of the Federated Suns as a surgeon following the invasion of the Clans. This action was in part to atone for her father's perceived sins and to restore her own honor, stained by her father's actions. It was during her service in the AFFS that she met Kai Allard-Liao.
Initially she had a strong attraction to Kai, but upon learning he was the son of the man who had killed her father she recoiled and vowed to avoid him. Confused by her actions, Kai acceded to her wishes to avoid contact. During the Second Battle of Twycross in 3050, the MASH unit that Dr. Lear was attached to was overrun by the Falcon Guards at the Great Gash. Responding to the frantic calls for help from the MASH unit and forced to borrow a 'Mech, Kai rushed to assist the beleaguered unit and in the process flanked the Falcon Guards. After rescuing Dr. Lear, Kai engineered the destruction of the Falcon Guards by self-destructing his borrowed Hatchetman, causing a terrific landslide that destroyed almost all of the Falcon Guards. Instead of being appreciative of Kai's rescue, Diedre appeared even more hateful toward Kai and they parted company again.
During the battle for Alyina in 3051, Diedre was among those left behind as the 10th Lyran Guards were forced to withdraw. Also among those left behind was Kai Allard-Liao who had sacrificed himself to ensure the escape of Victor Steiner-Davion. During the next several months when they were trapped behind enemy lines, Diedre allowed her hatred of Kai to slip and eventually she fell deeply in love with him. Eventually, Diedre and Kai escaped from Alyina after they were granted Safcon as reward for assisting the Jade Falcon garrison forces defeat the ComStar forces that had attacked them as part of Operation Scorpion.
Following Kai's sojourn on Solaris as champion, Diedre and he were married. Diedre and Kai had two children, David Lear and Melissa Allard-Liao. Diedre continued her medical practice after her marriage to Kai.