Ask AI: what if by accident a Government Killed 2500000 people and the news leaked to the globe?

It would depend on the country and the circumstances, but the likely response would be widespread condemnation, as well as international sanctions and calls for accountability. People around the world would be horrified at the loss of life and demand justice. A public inquiry would likely be set up to investigate the incident and, if needed, a criminal trial would be held to determine whether any individuals involved should be held accountable. Depending on the severity of the situation, the incident may even move towards international legal proceedings or a tribunal.