My grandfather landed at Tarawa. He only talked about privately, it to family members that were in the service.
> The doctor ... his description was that doctors, while they had rank, were largely left alone to their own devices to do what they needed to do. Rank wasn't really relevant to their daily lives.
From my experience, military doctors tend to be doctors that happen to wear a uniform. They already have the skills actually needed by the service (unlike most military jobs, where it's assumed that you know little to nothing of the job), the direct commissioning training is mostly so they can function and fit in that environment.