Marvel Comics timeline

A timeline for the events of the Generation 1 Marvel Comics universe(s). UK-only historical events are in italics.

(CONTINUITY NOTE: Beast Wars and Beast Machines take place in a universe that likely shares many facets of this timeline. Though exactly which and how many of these events, or those of the Generation 1 cartoon timeline, occur in that continuity is unknown, a link to the Beast Era timeline is provided for reference here at the points where a major historical event from those shows would occur.)

The Dawn of Time
The universe is created. It's unknown if this was an accident, or if some god had anything to do with it.

Prehistory
Birth of Cybertron

War on the Horizon
The Decepticons were considered harmless cranks to be humored, but ultimately ignored. Megatron rose within their ranks and crafted the malcontent group into a a more formidible organization.

Early Great War
Megatron (G1) leads the Decepticons, but he will vanish after only 100 years.

4 million years ago
Cybertron passes near Earth's solar system. The planet's energy supplies have been drained to critical by the war.

1984
A volcanic eruption reactivates Teletraan I, the internal computer of the Ark. The Autobots and the Decepticons awaken, and restart the Great War.