The Robotech Defense Force (RDF) is a fictional military organization featured in the animated series Robotech. It is responsible for defending Earth against various alien threats, particularly the Zentradi, a race of giant warriors. The RDF utilizes advanced technology, including transforming mecha known as Veritech fighters, to engage in aerial and ground combat. The RDF is formed after humanity discovers and reverse-engineers alien technology from a crashed spacecraft. This organization plays a crucial role in uniting Earth's forces and coordinating defense strategies. Key characters, such as Rick Hunter and Lisa Hayes, are prominent members of the RDF, showcasing leadership and bravery in battles.