Another consideration is that operational losses may occur.By operational losses, wemeanthose due to noncombat mishaps, such as disease,desertion,and breakdown of machinery.Many of the factors involved in the operational loss rate,such as psychological factors inherent in desertion,would be difficult to identify precisely.However,we might assume that the operation loss rate is proportional to the strength of the force.In that case,also assuming there are reinforcements,the rate of change of the X force level would be