The United States Army in World War II used a variety of standard and non-standard dress and battle uniforms, which often changed depending upon the theater of war, climatic environment, and supply exigencies.

M-1943 Combat Field Uniform Water & wind resistant jacket and over-trousers for combat field wear. Note the jacket's longer length, darker color, and greater pocket area than the field jacket shown in figure 5.

During World War II, the color of the US Army uniform went through a significant evolution. Initially, the standard color was olive drab shade number three (OD3), which was a brownish-green hue. This color was used for both the combat uniform and various accessories.

World War II. Probably no army in history has had a relationship with a single color as the US Army has had with Olive Drab. This color was originally introduced as early as World War I and became the standard color for all combat vehicles until the second half of the Cold War.