Caldoon 4

Caldoon 4, or Caldoon IV, is a planet in the Caldoon System, and was the site of a battle a long time ago.

Fiction

IDW Generation 1 continuity

Caldoon 4 was the site of a battle between Overlord and a group of Autobot soldiers. Kup was in this group, and he was almost defeated by Overlord, when Overlord flew off to attend a holoconference with Megatron, Sixshot and Black Shadow. Megatron informed Overlord and the others that they would be his phase-sixers. Overlord said he had other ambitions, and Megatron told him that if he followed those ambitions, he would be destroyed. Overlord went back to the fight, but he flew off, sparing Kup's life again. Last Stand of the Wreckers #2

The AllSpark Almanac

There were two Caldoon IVs. Both Caldoon IVs were unclaimed or neutral robotic planets in the Milky Way. The AllSpark Almanac II