Grozny was famously indiscriminate, but I don't think its inhabitants were systematically targeted as such (despite war crimes there were no accusations of genocide, IIRC). We obviously saw widespread slaughter in Rwanda, Bosnia, and Nanjing, but as far as I'm aware not a systematic destruction of civilian infrastructure that resembled progressively erasing a city from the face of the earth.
The firebombing of Dresden and the use of atomic weapons against Hiroshima and Nagasaki feel like candidates in terms of the scale of devastation, but they weren't carried out by an occupying force.
Are there other examples from WWII or WWI that might fit the criteria or do we have to go back farther? Under what circumstances might this have happened?
To put it another way, I can think of examples of:
*"I want to conquer this city, so I'll put it under siege and starve the inhabitants until I can breach the walls";
*"I want to punish my enemy and scare people, so I will raze this city to the ground"; and
*"I occupy a city inhabited by a different group of people who I don't like, so I will kill or displace them and keep the physical infrastructure of the city for myself."
But I'm struggling to think of cases in which all of these have coincided (apparent effort to eliminate a group of people as such and also wipe a city off the face of the earth, by a power that already effectively occupies that city, controlling everything going in and out more than decade, able to strike anywhere in the city at will, able to force relocation of inhabitants without credible resistance, etc). On top of that, I’m struggling to imagine even why they would coincide, considering that you would presumably want to keep the buildings, if only to save yourself the work of building your own houses and libraries.
So to what extent are the circumstances Ive described historically unique vs commonplace? If not unique, are there any common threads linking the examples we have?