Combat effectiveness is the capacity or performance of a military force to succeed in undertaking an operation, mission or objective. Determining optimal combat effectiveness is crucial in the armed forces, whether they are deployed on land, air or sea. Combat effectiveness is an aspect of military effectiveness and can be attributed to the strength of combat support including the quality and quantity of logistics, weapons and equipment as well as military tactics, the psychological states of soldiers, level of influence of leaders, skill and motivation that can arise from nationalism to survival are all capable of contributing to success on the battlefield. Quantitative measures Philip Hayward proposes a measure for combat effectiveness, concentrating on the "probability of success" in a combat environment in relation to factors such as manpower and military stratagem. Combat effectiveness can be represented as a real and continuous function, ...