In October 1942, Craigie, then a colonel, became the first pilot of the Armed Forces to fly a jet-propelled plane when he piloted the XP-59 on its initial flight at Muroc Dry Lake, California, March 1943 he was assigned briefly to the 1st Fighter Command at Mitchel Field, New York, and the following month took command of the Boston Air Defense Wing in Massachusetts. Three months later he commanded the New York Fighter Wing and was advanced to brigadier general in September.