The OG-107, also known as the Olive Green 107 uniform, was a standard fatigue uniform worn by the United States Army from the late 1950s through the 1980s. It was a durable and utilitarian uniform made of olive green cotton and consisted of a button-down shirt and trousers. The OG-107 uniform was widely used during the Vietnam War and became an iconic symbol of that era, with variations adapted for different climates and roles within the military.