Source : Webster's Revised Unabridged Dictionary (1913)

Countermarch \Coun`ter*march"\ (koun`t?r-m?rch"), v. i. [imp. &
   p. p. {Countermarched} (-m?rcht"); p. pr. & vb. n.
   {Countermarching}.] (Mil.)
   To march back, or to march in reversed order.

         The two armies marched and countermarched, drew near
         and receded.                             --Macaulay.