cotton field jacket was the standard outer garment for all army personnel, except those that had other specialist clothing (Paratroopers wore the parachutist's coat and trousers, tank crews wore the tanker's jacket, various types of  parkas were worn in cold weather, etc.).
The standard outerwear garment for all army personnel was a cotton field jacket, except those who had specialized clothing (Paratroopers wore the parachutist's coat and trousers, tank crews wore the tanker's jacket, various types of parkas were worn in cold weather, etc.).