The bombing of Dresden, Germany, which began February 13, 1945, was once viewed as a historical footnote. Until Slaughterhouse-Five was published.
The American and British bombing of Dresden, Germany, which began February 13, 1945, was once viewed as an historical footnote to a much-wider story. After all, it took place near the end of World War II, a war characterized by atrocities too numerous to count.
Then came the 1969 publication of a science fiction novel called Slaughterhouse-Five by Kurt Vonnegut, Jr. He had witnessed the bombing as an American POW, and survived by taking shelter in a meat locker in the historic German city. The novel tells the story of Billy Pilgrim, also an American POW in Dresden, who time travels through space and comments on barbarity with the understated mantra of “So It Goes.”

The novel became Vonnegut’s iconic work, selling more than 800,000 copies in the U.S. It was widely translated. Slaughterhouse-Five was read widely as a graphic statement on the futility of war, capturing the zeitgeist of the time, when anti-Vietnam War protests were at their zenith.
“All this happened, more or less,” is how Vonnegut introduces the novel.
Vonnegut’s novel re-opened an old wound: Was the Dresden bombing morally justified? Was it simply an act of vengeance for Nazi crimes, inflicted upon innocent civilians? Or was it necessary to bring the war in Europe to a close?
In the novel, Vonnegut describes Billy Pilgrim as witnessing the worst act of mass violence in European history, comparable to the atomic bombing of Hiroshima. Citing a widely-published history of the time, he put the Dresden fatalities at 125,000.
the rest of the article by Peter Feuerherd is here
more about Kurt Vonnegut is https://www.vonnegutlibrary.org/biography/