This thesis demonstrates the use of the Dempster-Shafer theory of evidence on the battlefield. The use of the theory in a Decision Aid or Decision Support System for the Intelligence Analyst will speed the force commander's Command and Control Cycle. The Command and Control Cycle is modelled and a benefit of enhanced command and control is described. The Dempster-Shafer theory is discussed using tactical battlefield examples. A Dempster-Shafer Decision Aid is presented as well as methods for improving computational speed. A specific application area, Situation Development Analysis in the All Source Analysis System (ASAS) is proposed.