In Season 2, episode 8, "The Trial of Henry Blake", Nurse Meg Cratty makes an appearance to defend LTC Blake as he was accused by Burns and Hoolihan E of granting aid and comfort to the enemy. She is wearing an OD uniform. The name tapes had been removed as well as the rank. However where the rank had been on the sleeves and the uniform faded, it is very clear that the rank that used to be on the uniform was that of Specialist. This rank was not in the Army system until after the war in Korea.