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Military vehicle maneuvers remove vegetation and increase the potential for soil erosion. Quantifying the vegetation removed during military maneuvers is needed to assist land managers in maintaining the environmental integrity of the training area. A terrain-vehicle impact model was used to predict terrain impacts (disturbed width and impact severity), based on vehicle properties, operating characteristics and soil strength properties. The cumulative impact width (CIW), a product of the disturbed width and impact severity, is the width of vegetation removed resulting from a passing wheeled or tracked vehicle. The vegetation removed is a direct indicator of increased soil erosion from the training area.