Total war was pretty much invented by Sherman, who decided to march across Georgia, burning everything that could possibly help the confederacy survive, and living off the land, instead of maintaining a supply line. It was stepped up a level when Germany invaded the low countries in 1914, lined civilians of nuetral countries up against the wall and shot them, and introduced poisen gas. By 1940, the Germans cranked total war up another notch, with the London Blitz. By the time the air war against Germany was in full swing, in 1942, the Americans and the British were bombing German cities, instead of just military targets, because they wanted to destroy the morale of the German people, and because the bombing of isolated military targets was so inaccurate that it had little affect on the German industrial capacity, while costing the allies unacceptable losses in planes and crews. We went full bore after that, and by 1945 were intentionally creating fire storms that killed as many as 100,000 Germans in Dresden alone. In fact, we would first drop 8,000 pound bombs to create major craters to hamper firefighting equpment, followed by concussion bombs that would blow out all the windows in the city to make the fire draft more effective, and then used incentarary bombs to burn the city. This system was especially used by the allies on older wooden cities.
It worked. By the Spring of 1945, there were virtually no targets left in Germany, and between the collapse of their industry and the soviet advance, they knew they were beat.
As for your comment:"Truman was one sick bastard...just like you.", all I need to say is that you had no dog in that fight. I did. My step-father was on line to invade Japan. It is so easy to moralize when you have nothing to lose. Truman was my hero, and if you think he was a sick bastard, then I am proud that you think I am, too.
The Good the Bad and the Ugly - Bath of Tuco - YouTube