A region of space almost 2000 light-years across. Sometimes likened to Earth's "Bermuda Triangle," the Expanse is home to many strange anomalies and dangerous species — sometimes even the laws of physics do not apply. Ships have been known to return from the Expanse with their crews' bodies anatomically inverted ... if they return at all. In 2153, Captain Archer and the crew of the Enterprise NX-01 were dispatched on a mission to the Expanse to locate the mysterious alien race known as the Xindi, after they were learned to be responsible for a devastating attack upon Earth.