Generally, a battle is a conceptual component in the hierarchy of combat in warfare between two or more armed forces, or combatants. A war sometimes consists of many battles. Battles generally are well defined in duration, area, and force commitment. Wars and military campaigns are guided by strategy, whereas battles take place on a level of planning and execution known as operational mobility. German strategist Carl von Clausewitz stated that “the employment of battles … to achieve the object of war” was the essence of strategy.