Third Cybertron War

The Third Cybertron War is a conflict between the Autobots and the Decepticons that occurred some time prior to the earth year 1985, apparently in the distant past.

The Decepticon drone Deceptitran uses encryption quite similar to the Decepticon transmissions of this period, and it's possible he dates from this time, though his occupation of the Tlakakans planet seems to be of a much more recent vintage.

Fiction
Perceptor intercepted Deceptitran's call encrypted for assistance and was able to discern its overall intent even without decrypting it. It was only later as he, Cosmos and Bumblebee were heading toward the Tlakakans planet that he found a strikingly similar transmission in his memory banks from the Third Cybertron War that he realized they were actually answering a Decepticon distress call!