One of five reports describing a study of two hypothetical war scenarios set in Central Europe in the mid-1970s, one with NATO forces on the defensive and one with NATO forces in a limited-objective offensive in response to an East German initiative. This particular report discusses the principal analytical tools used in the course of the study: TOTEM and TALLY. TOTEM simulates two-sided, conventional land warfare at the regimental level of detail. It is a player-interactive device developed at RAND over a period of years and is used for general-purpose force studies. TALLY simulates the conflict between the opposing air forces and embodies a two-sided, expected-value mathematical model of the air war. Illustrative input and output material is included.