I apologize in advance, I'm about to be somewhat pedantic. >But they were a clear victim in WWII; the amount of blood they shed was absolutely unreal. If I've

I apologize in advance, I'm about to be somewhat pedantic. >But they were a clear victim in WWII; the amount of blood they shed was absolutely unreal. If I've understood your intent correctly, you probably want "...the amount of their blood that was shed...". My understanding of "blood they shed was absolutely unreal" would be that they were killing others in massive amounts.