Countermarch

Pronunciation: koun"t?r-m?rch`
n.
  1. A marching back; retrocession.
  2. (Mil.) An evolution by which a body of troops change front or reverse the direction of march while retaining the same men in the front rank; also, a movement by which the rear rank becomes the front one, either with or without changing the right to the left.
  3. A change of measures; alteration of conduct.