Of course, we do know what all-out, incessant aerial bombing of cities looks like...London during the Blitz, Dresden, Tokyo...

And the US occupation doesn't count or report civilian casualites, just "insurgent" and "terrorist" casualties.

At the Hague in 1899, forty-four nations solemnly agreed by treaty to refrain from conducting aerial bombardments of cities.

We can see how well that one is holding up. No body bombs 'em better than the US, though. Nobody comes even close to committing the number of war atrocities as the Americans have in the last centuries. Not even the Brits.