Tarn (polity)

Tarn was one of Cybertron's many city-states before the advent of the Great War and was ruled by a military dictator named Shockwave.

History
War had broken out between Tarn and Vos despite an Overlord's attempts to lay the foundation of peace between Cybertron's city states by holding the State Games, which were arena tournaments.

After Tarn and Vos had destroyed each other with photon missiles, Megatron recruited many of the survivors into his new Decepticon army by laying blame on Iacon.