The Transformers - Headmasters #1-4 (1987) Complete

The Transformers: Headmasters is a four-part mini-series published by Marvel Comics, and is set in the same continuity as The Transformers. It involves the Autobots led by Fortress Maximus and the Decepticons led by Scorponok, and their War on the planet Nebulos. It also introduces the Headmaster, Powermaster, and Targetmaster concept to the Transformers Universe.
The Headmasters plot continued in the ongoing Marvel storyline with The Transformers #38.
Collected in The Transformers Classics vol. 7.