An American serviceman pauses on a jungle trail in the China-Burma-India Theater, his field jacket bearing a large American flag panel — a "blood chit" device meant to help identify Allied airmen as friendly to local civilians if forced down in unfamiliar territory. He is accompanied by fellow servicemen and Chinese porters or guides, illustrating the close cooperation between American forces and local populations that sustained supply and rescue operations along the rugged mountain routes of the CBI Theater during World War II. Project: 218098