Home built with marble tombstones from the graves of 2,200 Union soldiers
atlasobscura.com
atlasobscura.com
Here's an Atlas Obscura entry about the mass grave of an estimated 6,000 Confederate soldiers detained by the Union as prisoners of war in Chicago: https://www.atlasobscura.com/places/confederate-mound
Even the number of people buried there is not known with certainty. And there seems to have been quite a few petitions to remove the monument with the 4,200 known names entirely. [1]
[1]: https://huskiecommons.lib.niu.edu/cgi/viewcontent.cgi?articl...
Except, of course, for the War in Heaven[1], where it was only angels warring. But seriously, I'm not sure the sentiment is entirely true. Oskar Schindler, Nicholas Winton, Raoul Wallenberg, Jeannie de Clarens, and plenty of others that risked their lives to save thousands, not to mention the Red Cross.
Oh, the joys of the depression.