- The Cybertron Alliance was a truce made during the Japanese version of Generation 2.
It would not last long. After an incident where Earthlings killed a Decepticon, Megatron called off the truce in a fit of rage and the Generation 2 battles began.
While the Alliance lasted, Autobots and Decepticons both wore a previously unseen symbol that combined elements of their individual sigils. The symbol bears a heavy resemblance to the proto-faction insignia discovered by Shockwave in the G1 Dreamwave comic.