Information flow in battalion command groups was measured via a questionnaire based on information presented during the brigade briefing. Data from 13 groups showed that a substantial amount of information was lost in the processes of communication and remembering. Averaged over all command groups, there were consistent differences in the percentage of available required information communicated through particular channels, varying from 17% to 80%. Among battalion commanders, those who transmitted more information received less froui their staffs. The fact that information loss was concentrated in specific, identifiable areas, indicates that efforts to improve communication can be focused where they are needed.