Firestorm: The Allied Bombing of Nazi Germany (2003)

From DVDTalk.com:

Firestorm is an in-depth assessment of one of the troubling policies of WW2 that led to the establishment of the Air Force as America's foremost strategic security enforcer.

Firestorm is told largely from the point of view of the victims of the allied bombing. The strategies and policies are discussed at length. The allies were committed to bombing as a long-term terror weapon that initially had little effect on German war production. The film shows the destruction in more detail than anything I've seen. We all remember film images of German cities reduced to empty brick skeletons, but Firestorm shows color aerial views that seem to last minutes, and cover dozens of square miles of absolute ruin.

The concept of Total War didn't come with machine guns or deadly gas, but with governments willing to extend the violence of war to civilian populations. In Total War all enemy citizens are fair targets. Tens of thousands of non-combatants were killed in single raids simply because it was possible to do so. Experience in England had proven that bombing only stiffened the resolve of civilians to resist, and in any event the German population was incapable of overthrowing their Nazi leaders. Hitler and Goebbels boasted of Vengeance weapons and brought heavy losses to England and Holland with cruise missiles and space-age liquid-fueled rockets. But the allies visited true vengeance on Germany, paying back the aggressor nation a hundred times over.