This section specifically deals with Robotech continuity. See the article about the SDF-1 for more general information from both Macross and Robotech.
The SDF-3 is the third Super Dimensional Fortress of the United Earth Forces, and was first introduced in Robotech II: The Sentinels (1986). In recent comics, it was identified by name as the Pioneer, and was rebuilt as a "Shadow Dimensional Fortress." It is commanded by Admiral Lisa Hunter, and later by her husband, Admiral Rick Hunter. In 2022, the SDF-3 was launched as the flagship of the Pioneer Expedition on a mission to find the Robotech Masters Homeworld to try and prevent another war on Earth. The mission, which would take many unexpected turns and face unimaginable challenges, would last 22 years.
Read more about this topic: List Of Robotech Vehicles, Spaceships