Likewise Navy Corpsmen on their way to support the Fleet Marine Forces will attend what used to be an 8-9 week Field Medical Service School where they are drilled by a Marine Drill Instructors. I suspect that the Marine Corps is stretched too thinly right now and the Army is doing this additional trainig because they have they have the personnel, facilities, etc. to accomplish it.
Personally I think that may be why we got along with the grunts so well. More than once I swung at a dogface just because the grunt beside me in the bar was needing somebody to watch his back.