I guess we disagree then.
For a variety of unique reasons that have to do with the bombings, I don't consider either Hiroshima and Nagasaki war crimes. But pertinent to this discussion would be the criteria that resulted in selecting targets. In the case of Hiroshima, it was an embarkation port and industrial center that was the site of a major military headquarters.
Despite the other qualifying reasons that I think make Hiroshima not a war crime, had those critical factors not been in place in that city, then yes I would declare it a war crime. While there was a certain 'shock-and-awe' objective, the ultimate target was military in nature - a crippling of a military HQ as well the industrial capacity to fuel war.
I think this is what happened with luna. When you build cities around military infrastructure, civilian casualties are to be expected - and a risk you take on.