The Collaborative International Dictionary of English v.0.48:

Storm \Storm\, v. t. [imp. & p. p. Stormed; p. pr. & vb. n.
   Storming.] (Mil.)
   To assault; to attack, and attempt to take, by scaling walls,
   forcing gates, breaches, or the like; as, to storm a
   fortified town.
   [1913 Webster]