The disbanding of the Six Nations' governments was quick.
Han Xiao's strength, power, and prestige were all higher than the Six Nations'. Despite being unwilling, the government officials of the Six Nations had no chance to fight back. In the face of overwhelming strength, they realized that if Black Star wanted to take over the entire Planet Aquamarine, it would be a piece of cake, yet he had waited till then to do so.
In the past, Bennett would not have agreed to the plan. However, after this incident, he was willing to take on greater responsibility. In his eyes, the future of the entire civilization was more important; the Six Nations were way too unreliable.
Peaceful means were used to disband the Six Nations. Neither Han Xiao nor Bennett wanted another war to break out on Planet Aquamarine. The bloody example of the Old Era was right in front of them, so Han Xiao's target was only the governments of the Six Nations.