Overview of Department of Defense Use of the Electromagnetic Spectrum [Updated February 10, 2021] [open pdf - 2MB]
From the Document: "The Department of Defense (DOD) is the largest federal user of the electromagnetic spectrum ('the spectrum'). It holds frequencies across multiple bands to support a number of technologies and uses. DOD utilizes spectrum on a day-to-day basis, for training, and for military operations. Thus, any changes to spectrum could affect DOD operations, both domestically and with allies abroad. Further, DOD has invested significantly in spectrum-dependent technologies. A summary of some of these technologies, including wireless communications, satellites, radar technologies that support situational awareness, signal intelligence and electronic warfare technologies, is provided below. Changes in spectrum may affect how DOD can use, manipulate, or develop these technologies. The Department of Defense (DOD), partly through congressional action, has begun to reprioritize its management and use of the spectrum. Since 2018, the DOD has created new organizational structures and is in the process of developing new strategies and policies, recognizing the importance the spectrum plays in military operations."
CRS Report for Congress, R46564
Congressional Research Service: https://crsreports.congress.gov/