The Collaborative International Dictionary of English v.0.48:

Storming \Storm"ing\,
   a. & n. from Storm, v.
   [1913 Webster]

   Storming party (Mil.), a party assigned to the duty of
      making the first assault in storming a fortress.
      [1913 Webster]

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]