I think a few here is fond of the old Franklin Delano Roosevelt, but looking into the actions that he did during the years into the prelude of World War 2 was really interesting. At his behest, he supplied Joseph Stalin and the whole Soviet Union of military equipment and intelligence to prepare for the Nazis. I really don't think that Americans during at the time was on board with supplying another enemy, the communists, with their own handmade products just to hold off the Reich.
Let's not get started with the internment camps he did against Americans of Japanese lineage after the Pearl Harbor attacks, how the Democrats were tight-lipped about it to this day, and the communist project that the former First Lady, Eleanor Roosevelt did in Arthurdale, Virginia, that was still left untold on how many people died due to starvation on that god forsaken experiment of hers.
That would stand to reason, Civilian casualties in the Civil War were vanishingly small. The Battle of Gettysburg incurred only one civilian death by arms, and it was an errant shell that struck a farm-house. The only other places I could see possible statistically significant civilian casualties might be in Mississippi (counter-insurgency against union occupation), West Virginia (insurrection and counter insurgency against Virginia), and Missouri (which I believe was engaged in small scale local conflicts).
It wouldn't totally surprise me. Guerrilla campaigns can spiral out of control quickly, but reprisal attacks have a nasty habit of losing all fucking control together. Even from the Japanese bias perspective of The Rape of Nanking, the commanders basically admit that they lost all command and control once the troops started engaging in executions and looting. They actually report personally trying to restore order against some specific troops that were engaging in wanton destruction, but they admit to loosing so much command and control cohesion that they were left without the ability to even stop the destruction. It is not unheard of for an army to lose all cohesion when sacking a town to the point that there is not ability to command it. I wouldn't be surprised if you told me that partisans burned Lawrence and their commanders actually lost control, and then recalled any further operations due to the fact that they weren't sure they could successfully control their own army.