This paper discusses some systems applications of plasma panel displays in military command, control, communication and intelligence (C3I) systems. The potential lethality and rapid pace of warfare on the modern battlefield make positive command and control of our armed forces more critical than ever. This gives rise to the need for highly mobile, user-friendly, automatic data processing systems which are able to survive extreme environments. The user is relatively unsophisticated, is unfamiliar with computer programing and is required to both operate the system and provide maintenance under highly stressful conditions. The plasma display, used in conjunction with a state-of-the-art micro-processor-based automatic data processing system, has a number of characteristics which make it particularly suitable as a man-machine interface to be used in tactical C3I equip-ment in the modern Army. A number of factors must be taken into consideration in the design of plasma displays so that they will be able not only to withstand the severe tactical environment to which they are exposed, but also to provide a user-friendly interface. Specific examples of tactical operational Army systems utilizing plasma displays of various sizes are discussed.