Super Dimensional Fortress-1, better known simply as the SDF-1, was the most historically significant warship in human history. Originally Zor's battlefortress, the SDF-1 was sent crashing into Earth's surface in 1999. The people of Earth united to re-build the ship, which would latter play a pivotal role in the First Robotech War, as well as the hunt for Protoculture across the universe.