The Dragoon R Delta Plus is a large weapon-based craft constructed by the United Galaxy Space Force around 2245 to combat new kind of Unknown Intellectual Mechanized Species, UIMSΔ from exacting the revenge against humanity. It was the successor craft to the Dragoon which were deployed in the previous conflicts against the mechanical UIMS race. The Dragoon J2 will be the successor to the Dragoon R Delta Plus against Zolgear. After the destruction of Zolgear, the Dragoon line of craft would be retired.