As technological advancements improved the means by which commanders command and control on the battlefield, communications security must remain ever present for mission success. Military battles require effective communications on every level, from seniors to subordinates, subordinates to seniors, and laterally. Communication is required to pass information, request support, coordinate events, and articulate desires between friends and foes. Because information is oftentimes sensitive, varying measures are often implemented to protect it from one degree to another. The role of signals or communications intelligence during the battles of Pearl Harbor and Midway, along with the ongoing enigma, comprise valid and tangible examples of the importance of communications security. These examples exhibited success and failure for both America and its foes. Today s battlefield is no different and is potentially more vulnerable due to the proliferation of communication systems, their availability, and deliberated adversarial influences to compromise American systems. Warfighters on every level must fully prepare to adapt communications security. Additionally, tactics, techniques, and procedures should incorporate communications security in every facet across the warfighting functions.