That's a hard to proof issue. There obviously aren't any official statements from each state and whistle blowers are easily silenced if the media is controlled

That's a hard to proof issue. There obviously aren't any official statements from each state and whistle blowers are easily silenced if the media is controlled like it is in China for example. Statements by other nations would have to be taken with a fuckton of salt as that could just be propaganda too. I don't think it will be possible to be certain about this, ever.