Adam Reinhardt was a Colonel during the Pioneer Expedition. (Robotech II: The Sentinels) He eventually became Major in the absence of Rick Hunter, who was believed dead at the time. He was one of the men in charge of the Robotech Relief Expedition, and sent John Carpenter to Earth with the mission to attempt to aide the Earth against the Robotech Masters and to tell the Earth forces that they could not send any more ships. He was the father of Gunther Reinhardt. (Masters Saga: "Outsiders")
Adam Reinhardt was a very respected EDF Officer and REF Commander during the Pioneer Expedition.
Behind the scenes
The Robotech II: The Sentinels film is the first appearance of Reinhardt within the Robotech series -- however, this appearance is notably absent from the comic and novel adaptation, instead replayed by a "Doctor Brosnon." Bronson can also be noted in the original script, and since the novels were adapted from the scripts and the scripts were altered before dubbing, this explains this discrepancy.