Iraq invasion (there’s thousands within this one including Abu ghraib) -america/nato
3- dressing up as medical personnel and massacring a refugee camp to save 1 person in gaza- Israel and America
4- a host of lesser known but many technical war crimes in Afghanistan like bombing undefended villages and towns https://www.culawreview.org/journal/double-standards-in-international-law-did-the-us-get-away-with-war-crimes-in-afghanistan
5- raping children and murdering their family. This is American tactic in Afghanistan, Iraq, Syria with many documented cases
Here’s 5 actual war crimes