Assigned to Air Defense Command (ADC) for most of its existence, the division's mission was the air defense of Montana, Idaho, Wyoming, and parts of Nevada, Utah, and Colorado. By 1953, the area changed to include North Dakota, South Dakota, and Nebraska. The 29th supervised the training of its units, and participated in numerous training exercises. Inactivated in November 1969 as ADC phased down its interceptor mission as the chances of a Soviet bomber attack on the United States seemed remote, its mission being consolidated into North American Aerospace Defense Command (NORAD).