Flashback: "Atlantic Core," Part 1

Allegedly, there's  a new Pacific Rim movie coming to theatres or something (but if no Guillermo, then it's not Pacific Rim, so no deal), so I figured the next Flashback story can be the Atlantic Core story, with inspiration from Pacific Rim, BattleTech, and other sources.

Destro lead Cobra in the Commander's absence.  Transformer Bludgeon lead the Decepticons in Megatron's absence.  When the leaders returned, Destro and Bludgeon soon found themselves sacked.  Where did they go from there, and how far did they take their revenge?

Find out in the Atlantic Core story!  Let's go fishing!