The famous blue uniform of the Marines with a standing collar. The uniform is similar to the one worn by Marines in the Civil War. The “sky blue” infantry trousers are adorned by a red “blood stripe” down the outside seams on commissioned and non-commissioned officers. This uniform is worn with medals (without medals it was at one time called Undress Blues). Current usage refers to: Blue Dress A (with medals), Blue Dress B (with ribbons), Blue Dress C (sky blue trousers with khaki shirt, field scarf and ribbons) and Blue Dress D (short sleeved khaki shirt and ribbons).