In the emergent era of great power competition, our nation's adversaries seek to achieve their strategic aims, short of traditional conflict, by the use of a stand-off approach across the warfighting domains. Our adversaries will leverage this “grey zone” conflict across Political, Military, Economic, Social, Information, Infrastructure, Physical Environment, and Time (PMESII-PT) in an attempt to defeat U.S. power. The importance of cross-functional integrated cyber, electronic warfare and signals intelligence has been recognized for the last decade not only the United States but across our near-peer competitors and potential adversaries. As the US Army builds force structure, doctrine, and material capability to meet the needs of cyber-electromagnetic activities (CEMA), one of the greatest challenges is understanding operational enablers/constraints and finding areas to conduct real world test and evaluation to enable realistic individual and collective training. Communications and aviation infrastructures rely tremendously upon the carefully regimented and controlled use of the electromagnetic spectrum, there are only a few areas in the United States suitable for conducting real world electronic warfare and signals intelligence training, key to fighting and winning in Multi-Domain Operations. However, an in-depth and comprehensive understanding of the reasons behind these restrictions, and of ways to work within them and mitigate them, will lead to greater training and testing opportunities, and a more powerful and lethal force. SGM (R) Reyes will speak on the spectrum and cyber training constraints within the continental United States and across operations, and methods to mitigate and work around them in order to achieve a well-trained and integrated CEMA Force and in support low probability of intercept/low probability of detection (LPD/LPI).