Command and control can be characterized as a dynamic human decision making process. A technological perspective of command and control has led system designers to propose solutions, such as decision support and information fusion, to overcome many domain problems. Solving the command and control problem requires balancing the human factor perspective with that of the system designer and coordinating the efforts in designing a cognitively fitted system to support the decision-makers. This paper discusses critical issues in the design of computer aids, such as a data/information fusion system, by which the decision-maker can better understand the situation in his area of operations, select a course of action, issue intent and orders, monitor the execution of operations, and evaluate the results. These aids will support the decision-makers in coping with uncertainty and disorder in warfare and in exploiting people or technology at critical times and places to ensure success in operations.