"Robotech: The Shadow Chronicles" (2006) is a feature-length animated sequel to the traditional Robotech storyline, overlapping briefly with the concluding events of the New Generation chapter while revealing several previously unknown details about the Robotech Expeditionary Force (REF) and its interactions with a mysterious race known as the Haydonites. Characters from all three chapters of Robotech appear along with others intended to have been introduced during the never-completed Sentinels saga.