The American Army had used Indians as guides ever since its inception, but they were em- ployed as civilians. It was not until an Act of Congress in July 1866 that Indians were actually enlisted and be- came an official unit of the U.S. Army. Brig. Gen. George Crook made extensive use of Apache scouts in Arizona territory to track down Apache renegades. Crook would emphasize their worth in his official “I cannot too strongly assert that there has never been any success in operations against these Indians, unless Indian scouts were used. These Chiricahua scouts...were of more value in hunting down and compel-ling the surrender of the renegades than all other troops...combined. The use of Indian scouts was dictated by the soundest of military policy.”