Made in America from multiple unrelated anime series including Super Dimensional Fortress Macross, Super Dimensional Calvary Southern Cross, Megazone 23, and Genesis Climber Mospeada. There was even a side story series entitled Robotech II: The Sentinels but it was dropped.
The First Season of Robotech is Titled, Robotech: The Macross Saga. Macross Saga follows the story of the Zentraedi Super Dimensional Fortress crash landing on a tiny island on Earth known as Macross Island. The UN Forces rebuild the ship and name it the SDF-1. The story follows rookie pilot Rick Hunter who accidentally ends up in a Veritech, transforming Fighter Jets used by the Robotech Defense Force, thanks to his long time friend Roy Fokker on the day the Zentraedi arrive at earth to reclaim the Super Dimensional Fortress. Rick is dragged along with the SDF-1 as well as the rest of Macross City as it Space Folds to lure the Zentraedi away from the Earth. Along the way Rick meets a singer named Lynn Minmei whom he quickly falls in love with (although the feeling is not mutual), cocky rookie pilot Ben Dixon, blue haired ace pilot Max Sterling, Executive Officer Lisa Hayes who ends up creating a love triangle between herself, Rick, and Minmei, and many other characters. Together, the SDF-1 learns about the Zentraedi's goals and weaknesses, and tries to save the Earth with love instead of fighting.
The Second season entitled Robotech: Masters follows the story of Dana Sterling, Daughter of Max, and the Army of the Southern Cross defending the Earth from the "parents" of the Zentraedi, the Robotech Masters. All the meanwhile, the Robotech Expeditionary Force (formerly the RDF) travel aboard the newly built SDF-3, with Rick and Lisa as the Admirals commanding it, to attack the Robotech Masters homeworld with the help of Zentraedi.
The Third season entitled Robotech: The New Generation continues from Masters. An alien race called the Invid invade Earth due to the events at the end of Masters. The Southern Cross Army is weak from the attack of the Robotech Masters and is wiped out by the Invid. The REF is still out in space, they were designed to operate without the help of Earth. The story follows rebel forces trying to free the Earth from the control of the Invid. Robotech: Shadow Chronicles is a direct sequel to The New Generation.