The first Iraq war (occupation of Kuwait) was legitimate. The second one was started under the (known) false premise of the presence of WMD:

https://en.wikipedia.org/wiki/Casualties_of_the_Iraq_War

"The Iraq Body Count project documents 185,000–208,000 violent civilian deaths through February 2020 in their table. All estimates of Iraq War casualties are disputed."

The official civilian casualties count in Ukraine so far is 600, according to the UN. Both wars are horrible.