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The SDF-1 was a Super Dimensional Fortress that crashed on Macross Island. It was manned by Rick Hunter and his crew who had traveled aboard the SDF-3 and went back in time to try to change the future using a Life-Pod containing Dana Sterling. Upon its crash landing on Macross Island, the crew all perished and was discovered by the military including Nicholas Hayes and Roy Fokker. Among those who examined it in the following Lazlo Zand and Thomas Riley Edwards discovered many secrets such as it being able to reach other dimensions and of enemies like the Invid.