The first military aviation insignias of the United States appeared during the Mexican Expedition of 1916 to 1917. The insignia featured here was first used in 1947 and is still in use today by the United States Air Force. It features twin insignia red lengthwise bars, bisecting the formerly all-white bars. Our premium 100% Airlume combed cotton unisex essential fits like a well-loved favorite. Featuring a crew neck and short sleeves, its unisex sizing and soft touch making it perfect for all history buffs.