I previously made a topic about this:
There may be something I'm missing, but doesn't it make sense for inflicted casualties to be more important than sustained casualties for war score? If you play as France and lost 500k manpower and only inflicted 30k manpower, you did pretty...
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Italy used the "we lost a lot of men" argument in World War I as well, but nobody cared because they lost them due to Luigi Cadorna's incompetence.
The Soviet Union is in a similar situation, they lost that many troops mostly due to their incompetence and disregard for human lives. But at the same time, the Soviet Union inflicted most casualties to Nazi Germany.
At the end of the day, who has a bigger says at the peace talks depends on military power. Stalin may have used the
"sustained casualities argument" to impress people, but the reason he got the deal he got had nothing to do with sustained casualities, and little to do with inflicted casualities. The reason he got the deal he got was because he had a huge army. This is also the reason why UK, US and France were the big 3 of the Entente. US barely had 117,000 sustained casualities in World War I.
The
"sustained casualities argument" is a good rhetoric, the key word here is rhetoric. Talking about your sustained casualities is more impressive as far as making other people sympathize with you goes. But that doesn't mean you contributed the most to the war effort. Or that talking about sustained casualities will convince the right people. It may convince civilians who knew little about the inner workings of the war, but you will have a hard time convincing generals and politicians who've seen how the war went. Therefore the real life examples with Italy and USA in World War I as well as USSR in World War II.