The In Amber Clad has a storied history in the UNSC, leaving the shipyard as the last Stalwart-class light frigate ever made in 2547, and by 2549 was the last Stalwart-class remaining in the UNSC fleet. A year later in 2550, command of the ship was given to Miranda Keyes, who had recently survived the Battle of Gamma Pavonis due to her heroic actions.
Prior to the start of the Battle for Earth, the In Amber Clad was docked at Cairo Station so Miranda Keyes could accept medals posthumously awarded to her father for his actions during the Battle of Installation 04. It was at this same time that the Battle for Earth begun, sending the In Amber Clad into battle, and leading to its involvement in the Battle of Mombasa.
When the Solemn Penance jumped into slipspace over New Mombasa, In Amber Clad was the only UNSC vessel close enough to intercept, and followed the Covenant ship through its slipspace wake all the way to Installation 05. Upon arrival at Delta Halo, In Amber Clad was able to deposit its forces ring-side, and was key in helping stop the Covenant from firing the Halo. Despite this victory, however, In Amber Clad was eventually overcome by the Flood, and became the primary vector for the Flood infection that spread to High Charity as it crashed into the Covenant holy city.