Robotech: Prelude to the Shadow Chronicles is a five-part comic book mini-series written by Tommy Yune along with the Waltrip brothers, who were previously the art-and-writing team of the Robotech II: The Sentinels comic series. It was published under DC Comics' Wildstorm imprint. It bridges the gap between The Sentinels and the new movie Robotech: The Shadow Chronicles, and also features characters from the Robotech Masters Saga. The series is important, in that it provides an explanation and deepened background for many of the events seen on screen in the movie, and clears up many supposed contradictions within the original animation.

Source: Wikipedia