attack by a part or all of a defending force against an enemy attacking force, for such specific purposes as regaining ground lost or cutting off or destroying enemy advance units, and with the general objective of denying to the enemy the attainment of his purpose in attacking, rünnak, milles kaitses olev üksus ründab ründavat vaenlast, et takistada vaenlasel saavutamast rünnaku eesmärki