Ask HN: Why wasn't the USA sanctioned over it's war with Iraq?

I do not want to minimize the seriousness of what is happening in the Ukraine. I would just like to know what the difference is between these two actions. The Iraq War(v2) resulted in hundreds of thousands Iraqi deaths (some estimate over a million). Given that we know that the USA reasoning for going to war with Iraq was based on misleading evidence, we could (and should) consider that each one of those Iraqi deaths to be unnescessary.