>>23418497
Kind of. Romefeller/Oz got spooked because the Alliance was becoming increasingly open to the idea of peace with the colonies not forcibly subjugating them. This would end the conflict between earth and space that Oz wanted(and instigated initially) to use as the basis for their coup and takeover of the Alliance. The Gundam pilots are then bamboozled into killing the Pro-Peace alliance leaders. This reignites the earth vs space sentiment globally, and creates enough of a power vacuum in the Alliance military, that they can pull off their Coup.

Almost immediately after that, Treize has his falling out with Romefeller over Tuberov and Durmeils intention to move to the Mobile dolls. So Treize quits. Which ironically prompts even more fighting because Oz immediately has a civil war between Treize loyalists standing up for his ideals, and the Romefeller loyalists.