Here are the cities that were nuked in the fighting from 1942 to 1944.
Berlin - 1942, The Race; the population of Berlin in 1939 was 4,338,756.
Washington D.C. - 1942, The Race; the population of D.C. in 1940 was 663,091.
Near Kaluga - 1943, USSR; used on troop concentration of unknown size. Casualties and losses of material were said to be heavy. They were SO heavy that operations were halted on the corresponding front.
Tokyo - 1943, The Race; the population of Tokyo in 1940 was 6,778,804.
Oels - 1943, Germany; used on troop concentrations of unknown size. Casualties and losses of material were said to be heavy. They were SO heavy that operations were halted on the corresponding front.
Munich - 1943, The Race; the population of Munich in 1940 was 834,500.
Chicago - 1943, USA; used on major troop concentrations of unknown size. Casualties and losses of material were said to be heavy. They were SO heavy that operations were halted on the corresponding front.
Seattle - 1943, The Race; the population of Seattle in 1940 was roughly 368,302.
Miami - 1943, USA; the population of Miami in 1940 was roughly 172,172.
Pearl Harbor - 1943, The Race; I am unable to find any good stats for the population of Pearl Harbor in the 40s, but the population of the territory of Hawaii in 1940 was about 423,330.
Rome - 1943, Germany; the earliest population figure I can find for Rome is from 1950, which is about 1,884,000.
Hamburg - 1943, The Race; the population of Hamburg in 1940 was 1,711,877.
Outside Denver - 1944, USA; used against major troop concentrations of unknown size. Casualties and losses of material were said to be heavy. They were SO heavy that operations were halted on the corresponding front.
Somewhere Between Orlando and Apopka, Florida - 1944, The Race; used against major troop concentrations of unknown size. Following the strike, The Race was able to push out of Florida with relative ease.
Sydney - 1944, The Race; the earliest population I can find id for Sydney in 1954, which was about 1,863,217.
Melbourne - 1944, The Race; the population of Melbourne in 1940 was roughly 1.1 million.
Alexandria - 1944, Germany; the earliest population figure I can find for Alexandria was for 1950, which was roughly 1,037,000.
Copenhagen - 1944, The Race; the population of Copenhagen in 1940 was 731,707.
Saratov - 1944, USSR; used on major troop concentrations of unknown size. Casualties and losses of material were said to be heavy. They were SO heavy that operations were halted on the corresponding front.
Magnitogorsk - 1944, The Race; the population of Magnitogorsk in 1940 was around 203,688.
As you can see, the civilian toll from Atomic Bombs ALONE has to be in the millions if you include the fallout after the strike. The largest city hit was Berlin by a longshot, which would have resulted in many casualties instantly.
I was more wondering about the possible military casualties inflicted during the fighting, and as I said in my first post, it has to be in the millions on both sides.. but more so on the side of humanity. The technological disparity is a major factor in the high death toll, along with the fact that the major nations were reaching into the bottom of the barrel for manpower, which can be seen when Mutt Daniels is allowed to volunteer despite the fact he was almost sixty by 1942. They needed all hands on deck. I haven't even thought about those who would have died from hunger and/or cold during the fighting. It is possible the overall toll may surpass the Second World War of the OTL, and that is quite the feat.
BY the end, both sides were exhausted; humanity was starting to feel the strain of long wars on their home soil while the Race was suffering disastrous supply problems and was starting to tear away at the garrisons for men to keep the many fronts going.