The confrontation with the current U.S. Congressman mentions the WW2 Allies fire bombing of Dresden Germany. I remember the late novelist Kurt Vonnegut writing about the firebombing of Dresden Germany. I mistakenly thought he had been there at the time, participating in the bombing from an Allied airplane (while later explaining that it was horrible.) No, I checked Wikipedia and he was there at the time of the firebombing as a POW, in an underground area.

Kurt_Vonnegut

On February 13, 1945, Dresden became the target of Allied forces. In the hours and days that followed, the Allies engaged in a firebombing of the city.[22] The offensive subsided on February 15, with about 25,000 civilians killed in the bombing. Vonnegut marveled at the level of both the destruction in Dresden and the secrecy that attended it. He had survived by taking refuge in a meat locker three stories underground.[8] "It was cool there, with cadavers hanging all around", Vonnegut said. "When we came up the city was gone ... They burnt the whole damn town down."[25] Vonnegut and other American prisoners were put to work immediately after the bombing, excavating bodies from the rubble.[26] He described the activity as a "terribly elaborate Easter-egg hunt".[25]

I think the WW2 Dresden, Tokyo, and other WW2 fire-bombings qualify as collective punishment, a war crime. Something not part of a military objective.