Trap
The rebellion of the Untamed Jungle, as Michael named it, was merely the beginning of a much bigger event. It triggered a domino effect of unknown extent.
Michael's earlier actions had already been enough to stagnate the progress of the Zentika Empire's invasion, however, the Monster Horde's attack and the annihilation of the Zentika Empire's camps was on an entirely different level.
Michael could have destroyed the camps as well, but he didn't want to attract more attention from the Zentika Empire. He had been hoping to reach a silent agreement with the camps to live peacefully alongside the camps, for a few months, at least. A few months would have been more than enough to focus on the Savannah Region and their Regional War.
He would have traveled to the Savannah Region once the situation allowed him to move freely, and attack the Council of Xylon alongside the Trilance and the Savannah Expedition. Unfortunately, that was not feasible.