Transformers Beast Machines was an animated series that ran between 1999 and 2000. It was a sequel to Transformers Beast Wars, which took place back on the Transformers home planet of Cybertron. Transformers Beast Machines was the last series to follow the timeline of the original Transformers series. The following series, Transformers Armada, started over with a new timeline, rewriting the Transformers series from the beginning.