2-8. The fundamental basis for the organization and operation of Army forces is combined arms. Combined arms is the integrated application of several arms to achieve an effect on the enemy that is greater than if each arm was used against the enemy separately or in sequence. Integration involves arrangement of battlefield actions in time, space, and purpose to produce maximum relative effects of combat power at a decisive place and time. Through force tailored organizations, commanders and their staffs integrate and synchronize the battlefield operating systems (BOS) to achieve combined arms effects and accomplish the mission.