Let’s talk about HBT. Prior to the outbreak of WWII, the US Army issued a blue denim uniform for fatigue duties and used the cotton khaki shirt and trousers for a summer uniform. In 1941, a green uniform made from cotton herringbone twill (HBT) fabric was introduced to replace them for field and fatigue use. Shirts, trousers, coveralls and caps were produced. The HBT uniforms were issued to all Army personnel in all theaters of operations. The "first pattern" HBT uniforms were made from a lighter "sage green" color cloth. Closure was provided by metal tack buttons with a 13-star logo printed on the face. The jacket had two pleated breast pockets and a waistband. The trousers were constructed with internal rear and hip pockets like the khaki cotton trousers.
In late 1942 this was replaced with the second pattern uniform, which became the most common field uniform of the War. The jacket had patch pockets and the waistband was eliminated. The hip and rear pockets were eliminated on the trousers and were replaced with two cargo pockets. In 1943, the color of the fabric was changed to a darker green "olive drab No. 7". A third pattern exists, which differed only by having folded pleats on the breast and cargo pockets. RRL makes an AMAZING pair of HBT trousers.