The overarching narrative of Robotech is a cycle of destruction and rebirth, with each saga's resolution directly causing the next conflict. The First Robotech War ('The Macross Saga') culminates in Episode 27, 'Force of Arms,' where the Zentraedi armada under Dolza bombards Earth, killing billions and reducing the planet to a wasteland. The SDF-1 and its Zentraedi allies defeat the armada by using Lynn Minmay's singing to create chaos, allowing the SDF-1 to ram Dolza's flagship, destroying the entire fleet in a massive explosion. In the aftermath, Rick Hunter realizes his mature love for Lisa Hayes, not his infatuation with Lynn Minmay. The human and Zentraedi survivors begin to rebuild society together.
The Second Robotech War ('The Masters') ends with the defeat of the Robotech Masters, but at a terrible cost. Their final, spiteful act is to saturate Earth's atmosphere with the spores of the Invid Flower of Life. This act is intended to destroy humanity but instead serves as a beacon. The hidden meaning, which becomes clear only later, is that the Masters' defeat was not an ending but a catalyst. The Protoculture they sought to control becomes the very thing that summons the planet's next conqueror.
The Third Robotech War ('The New Generation') concludes with the final battle at the Invid's main hive, Reflex Point. The Invid Regis, facing defeat and seeing that her race cannot evolve on a world dominated by warfare, chooses to depart Earth and seek a new home in the cosmos. The Robotech Expeditionary Force, led by Lisa Hayes-Hunter, arrives too late for the main battle and nearly scours the planet with neutron missiles before the Invid depart. The series ends on a significant cliffhanger: Scott Bernard, having fulfilled his mission, decides to search for the missing Admiral Rick Hunter and the SDF-3, whose fate remains unknown. This ending was designed to lead into the aborted sequel, 'The Sentinels,' leaving the ultimate fate of the original series' most beloved characters unresolved.