Out of the major powers of WWII (Germany/Japan/Italy, USSR/US/UK/China, perhaps others), what were their officers' casualty rates? Were any unusually low or high?
Officers are important parts of armies; the loss of a unit's officers in battle greatly diminishes their effectiveness, they are also hard to replace, as it usually takes years to train one. Between different armies, officer casualty rates might differ for many reasons, like how effectively their tactics protect their officers, or how much their doctrine places them at risk, like leading from the front, or emphasising personal heroism.
I tried looking online, but usually the statistics are specific to one country, or a comparison between branches and eras. I would like to see a comparison across the different powers of WWII.